C. R. Osten Sacken - 1882 - Diptera from the Philippine Islands. Berlin. Ent. Zeitschr. 26: 83-120; 187-25:2. %*'^v^"C • 1 p, «■'#■'**««■ * ' •\i. * <.«>.,. ".^ i .!-«•!* all -» «» •«» A^ « « ■•■»• «»'■•»•«' ss t^ m i^ » >*^„ » . » •d *• « « ->,. •**«.°*«**al'*-„'^)''' ^ ^'^ ■* 4 " " -^ ,' •I (« •■• SjS iA, 'ft ,-flK'(»*>v-C'^^^ ^. 1. ■ ft^^ .(K> <» 6» »* ^jw; <*5 « ir *« i^-^^^ r /* titt at w t * 4* ^ ^ »» l«$ 1^ . -. *. >• » n " ,*-*^w'" «• « >" ^-^~. ,^ ,^ «^-, ^ ««> Vf 1^ vBB /^ • - •^yj^> *! ^ tr J '' "^ i( 4|» W <| «B Its '(»• M > ^ 2^f/''/f''''"*M »* m <9 Vj, ^.«!A.«^n. FA- - hoi, i« « % •» r ...•*« %-•*«■'..''' _ ■■""■. ■■■■■ 5« *«»■ ***• ifii #' [Berliner- Entoraologische Zeitschrift. Bd. XXVI. 1882. Heft I. Diptera from the Philippine Islands brought home by Dr. Carl Semper, and described by C R. Osten Sacken. Preface. Up to the present time only a few diptera from the Philippine Islands have been described. In Wiedemann I find but a single species from that region; Macquart and Walker (in his List of the Diptera of the British Museum) have a few more ; Schiner and Thomson published those brought home by the naturalists of the ,,Novara'' and the „Eugenia'*. In all, I find fifty two described species, the list of which will be given below. The collection formed by Dr. Carl Semper, now Professor in Wiirzburg, during his residence in the Philippines (1859 — 64) contains about 250 species, and enables us for the first time to form some idea of the character of the fauna. This collection was entrusted in 1865 to the able hands of my friend Professor Bellardi in Turin, and it is very much to be regretted that other occupations prevented him from accomplishing his purpose to describe it. In November 1880 it came into my possession. — While still in the hands of Prof. Bellardi, the collection was sent by him to Mr. Walker in London for the purpose of comparing the specimens with those in the British Museum, Mr. Walker mentions this circumstance (J. Proc. Lin. Soc. IX, p. 1) and introduces the species identified by him in his „Synopsis of the Diptera of the Eastern Archipelago, discovered by Mr. Wallace" (1. c. p. 7 and the following, fourth column, Philippines). The species thus identified however were few in number, and the identifications, even of Mr. Walker's own species, were far from trustworthy. I will discuss them in the proper places. In preparing the present work, I have followed the same rules as those which I explained in the Preface to my „Enumeration of theN^ ^^:] ^^ Diptera of the Malay Archipelago etc." (Annali del Museo Civico Sc. Natur. ^ di Genova, Vol. XVI). I consider the description of a limited faunal collection from a little-known region, as being merely preliminary work, y^ J preparing materials for systematic monographs. The final descriptions of species must be comparative ones, based upon the knowledge of all or nearly all the species of a given region. For this reason, I confined myself to describing the most striking forms only, and did not deem 6* 84 C. R. Osten Sacken: Diptera it my duty to describe as new, every specimen that I could not determine. A peculiar diflFiculty, attending the study of the diptera in the large groups of islands of South Eastern Asia, consists in the local varieties, which seem to exist on different islands. In several instances I have been in doubt, whether to regard them as distinct species, or as mere varieties; (for instance Rosapha habilis Wk. and R. bicolor Bigot; the specimens of Chrysopila ferruginosa Wied. with brown incisures on the abdomen, and those without them etc.). Such questions will be easier to solve in a special monograph, based upon more abundant materials. Incidentally, I have inserted general observations on genera, groups and families, which I thought might be useful to the future worker in the same direction. The synoptic tables which I give, will save him some labor, but must be used with caution, as they have of necessity been prepared either from notes, taken in different collections, or merely from descriptions. It would be premature to found, upon such small materials, a final opinion on the relation of the dipterous fauna of the Philippine Islands to that of the Malay Archipelago. Thus much is evident, that the relationship is considerable. Both faunas agree in the large representation of certain groups of diptera (for instance the genera Laphria, Promachus, Ommatius, Milesia, the family Ortalidae), as well as in the scanty representation of other groups (the Dasypogonina , with the exception of a few genera, like Leptogaster and Damalis; the whole family Bombylidae). Species widespread over South-Eastern Asia, occur here also (Chrysops dispar, Chrysopila ferruginea, Psilophus vittatus, Syrphus aegrotus, Eristalis errans, Ochromyia ferruginea, several Luciliae, Scholastes cinctus, Nerius fuscus etc.). Several forms of an apparently more restricted area are common to the Islands and to Amboina (the genera Scamboneura and Damalina) , to Celebes (the genera Rosapha, Telostylus; the species Sphyracephala cothurnata, Diopsis subnotata, Tabanus v. d. Wulpi etc.). The claim of a fauna to individuality, the degree of its specialization, are more difficult to define, upon such meagre data, than its relationship to another fauna. In the present case, the relationship shows itself principally in a similar distribution of groups ; whether the specialization, when better investigated, will assert itself in a large proportion of peculiar species, remains to be seen. In the vertebrata, the specialization of the fauna of the Philippines is very remarkable. According to Mr. A. R. Wallace (Island Life, p. 361) about nine-tenths of the mammalia and two-thirds of the land -birds are peculiar species. Such data led Mr. Wallace to believe from the Philippine Islands. 85 ,,that the Philippines once formed part of the great Malayan extension „of Asia, but that they were separated considerably earlier than ,,Java and having been since greatly isolated and much broken up „by volcanic disturbances, their species have for the most part been ,, modified into distinct local species" (Compare also Wallace, Geogr. Distrib. of Animals, I, 345 — 349). The scrutiny of the small collection before me reveals in some groups traces of a rather striking specialization; but whether they will be sustained by further discovery, is still a question. I have been especially struck by the peculiar characters of the Tipulidae: the two species of Libnotes, described by me, have a peculiar coloring, different from that of the eleven known species of the same genus from other parts of South Eastern Asia. Eriocera is a genus abundantly represented in all the tropical regions of Asia and America, but most of the species have only four posterior cells; among two dozen described Eriocerae from S. E. Asia only five species have five posterior cells. Now, both species, which I describe from the Philippine Islands, have five posterior cells. The Ctenophorae (Tipulidae) from the Islands also have some peculiarities in common. As far as regards the genera, it is the family Ortalidae that seems to be the most specialized. I have been obliged to introduce in it not less than four new genera, all of them remarkable forms, not known before (Antineura,Philocompus,Xenaspis,Naupoda). The other new genera introduced by me are: Scamboneura (Tipulidae), which also occurs in Amboina; Eurybata (Micropezidae) , represented in Amboina by a closely allied form, which I provisionally refer to the same genus. Notopsila (Ortalidae), merely a new name for Pachycephala Dolesch., which is preoccupied. It likewise occurs in Amboina, and is closely related to the Australian Euprosopiae. Asyntona (Ortalidae) from Amboina; I have described it on account of its relationship to Naupoda. That the Islands, especially the Northern parts of Lu^on, have some points in common with China is very probable, but hardly possible to ascertain now, on account of the insufficient knowledge of the Chinese fauna. Such points of contact between the two faunas have been shown to exist in the Lepidoptera (Compare the article of Mr. George Semper in the Stett. Entom. Zeit. 1875, p. 409.) I have not been able to obtain data on the other orders of insects. In the course of this paper I have used the terminology for the bristles, parts of the thorax etc. adopted by me in my recent paper: An Essay of comparative Chaetotaxy (Mitth. Miinchener Entomol. Vereins, Vol. V). Heidelberg, Germany, January 1882. C. R. 0. S. 86 C R. Osten Sacken: Diptera List of the species previously described from the Phihppine Islands. (Those marked with a star are represented in Professor Semper's collection,) Corethra manillensis Schin. Novara, 30. Chironomus trochanteratus Thomson, Eugenie's Resa, 445. TanT/pus manillensis Schiner, Novara, 26. Chrysomyia annulipes Thomson, 1. c. 461. Odontomy'ia ochropa Thorns., 1. c. 456. „ claripennis Thorns., 1. c. 456. Nemotelus alhiventris Thorns., 1. c. 462. *jEphippium maculipenne Macq., D. E. Suppl. IV, 54. ^ Ptilocera smaragdina Walker, List etc. Ill, 525. JPhyllophora bispinosa Thoms., 1. c. 454 (Syn. of Biastes indicus Wk.) *Calochaetis bicolor Bigot, Ann. Soc. Ent. Fr. 1879 (Calochaetis Syn. Rosapha Wk.) Tahanus manillensis Schiner, Novara, 84. Chrysops manillensis Schiner, Novara, 104. Diahasis fiavipennis Macq., D. E. Suppl. IV, 35, *Thereva lateralis (Esch.) Wied. A. Z. I, 231. Anthrax umbrifer Walk. List etc. II, 237. *Laphria dimidiata Macq. D. E, Suppl. I, 72. „ Taphius Wk. List etc. II, 380 (perhaps the same as L, dimidiata?). *Philodicus longipes Schiner, Novara, 179. Erax integer Macq. D. E. Suppl. I, 81. * Promachus forcipatus Sehin., Nov,, 178. „ macidosus Macq. D. E. I, 2, 100 (Trupauea). * „ manillensis Macq., D. E. I, 2, 194; Suppl. I, 79 (Trupanea). „ varipes Macq., D. E. I, 2, 97 (5 Bengal); Suppl. I, 79 ($ Manilla) (Trupanea). Eristalis chalcopygus Wied., A, Z. II, 178. „ Plistoanax Walk., List, etc III, 628. „ Bahytace Walk., 1. c. 629, „ Agyrus Walk., 1. c. 629. Scopolia spinicosta Thorns., Eug. R. 528. Musca niveisquama Thoms., 1. c. 547. „ bivittata Thoms., 1. e. 547. Rutilia duhia Macq., D. E. Suppl. I, 182. Anthomyia manillensis Fmf. Verh. Z. B. Ges. 1867, 449. from the Philippine Islands. 87 lAspe grandis Thorns,, I. c, 561. Somomyia tagaliana Bigot, Ann. Soc. Ent. Fr. 1877, 44. Lucilia philippensis Macq., D. E. II, 3, 146. Sarcophaga frontalis Thorns., Eug. R. 535. „ spininervis Thoms., 1. c. 538. Coenosia picicrus Thoms., 1. c. 558. Lauxania latifrons Thoms., 1. c. 567. Sepsis linearis Wk., List etc. IV. 998. Galohata coarctata Wk., J. Pr. Lin. Soc V. 298. Lamprogaster placida Wk., List etc. IV. 802 (Chromatorayia). * Stenopterina abrupta Thoms., 1. c. 578 (Syn. of S. eques Sch.) Dacus trivittatus Wk., List etc. IV. 1072. *IIerina fusca Thoms., I. c. 575 (belongs to the Genus Rivellia). *Acinia stellata Macq., D. E. Suppl. IV. 293. *Trypeta Elimia Wk., List etc. IV. 1033. *Diopsis suhnotata Westw., Cab. Orient. Ent. Chlorops vittipennis Thomson, Eug. R. 604. Ephydra pleuralis Thomson, 1. c. 591. Notiphila sternalis Thomson, 1. c. 593. The following species are mentioned as having been received from the Philippine Islands, although the specimens originally described came from other localities. Microstylum dux Wied., A. Z. I, 568 (China), in Macq. D. E. I, 2, 29 (Manilla), where Macquart confuses it with Dasyp. chinense Wied. Hoplistomera serripes Macq., D. E. I. 2, 60 (Guinea, Senegal) and Suppl. I, 71 (Manilla). This, of course, repuires confirmation. Celyphus obtectus Dalm. and C. scutatus Wied. in Walker's List etc. IV, 1138. The following names I find in the column ,, Philippines" of Mr, Walker's Synopsis etc. (1. c.) without any other authority for the statement, neither in the previous litterature, nor in Dr. Semper's collection : Ommatius retrahens, nanus; Idia prolata; Muscafavillacea; Lonchaea punctipennis ; Achias macidipennis ; Discomyza obscurata; Nycteribia dubia. 88 C M. Osten Sacken: Diptera The Diptera of the Philippine Islands. Tipnlidae. Dicranomyia saltans Dolesch. 2 Bijdr. 14, Tab. II, f. 3 {Limnobia saltans; Java). — Remarkable for the unusual shortness of the cells in the apical portion of the wing and the slenderness of the legs. The venation and the absence of spurs and empodia prove it to be a Dicranomyia. Doleschall calls the antennae 16 -jointed; as far as I can discern, the only antenna of my only specimen has the normal number of 14 joints. According to the same author, this species is very numerous during the season of the dry monsoon ; it is often found in dwellings, principally in the corners, in large numbers, dancing up and down in the air; they keep so close together that they seem to hold each other in dancing, and to form a regular chain. Liihnotes Semperi n. sp. $. Thorax bright orange; abdomen deep black; wings uniformly brown. — Length: 11 — 12 mm. Head reddish-brown; rostrum, palpi and antennae black. The whole thorax, including coxae, bright orange. Halteres brown, extreme base orange. Abdomen deep velvet black, except the extreme base, which is orange. Legs brown. Wings uniformly brown; bases of the 2°"* and 3'''* post. c. on the same line; first vein incurved towards the second. — A single female. Libnotes termitina n. sp. ^ Q. Uniformly yellowish- orange; extreme tip of the abdomen black; wings brown. Length; 11—12 mm. Antennae black (reddish at the base in one of the specimens); rostrum brownish; palpi brown; halteres with a brown knob; stem paler; legs brown; femora more or less yellow, but brown towards the tip. In the male, the genitals are deep-black, in the female, the last abdominal segment, although the valves of the ovipositor have the usual, brownish- ferruginous color; they are very short. Wings tinged with brown (less dark than L. Semperi); this color is rather uniformly spread over the whole surface; the apex is slightly darker. First vein incurved towards the second ; bases of second and third post. c. on the same line. — A male and a female. from, the Philippine Islands. 89 Libnotes familiaris n. sp. g. Ochraceous, thorax with a brown stripe; wings hyaline, with a small stigmatic pale brown spot. — Length about 7 mm. Resembles the european L. modesta in its coloring. Head, rostrun\, palpi and antennae black (at least apparently so ; the head is somewhat injured). Thorax ochraceous-yellow, shining, with a brown stripe in the middle of the dorsum. Halteres brownish. Abdomen and genitals brownish. Legs yellowish brown. Wings altogether hyaline, with brown veins; a small, rounded brownish stigmatic spot at the end of the first vein; the latter is incurved towards the costa and has the crossvein very close by its tip; bases of the 2°^ and S"^** post. c. almost on the same line , the 2°** being a little more drawn inwards. — A single male. Mongoma tenera n. sp. $. Head dark brown, antennae and palpi brown, rostrum, yellowish; thorax reddish-brown above, more yellowish below; abdomen, including the genitals, brown, the venter yellowish. Wings tinged with grayish; halteres broivn. Femora pale brownish; the tip, as well as the remainder of the leg, whitish. — Length 8 — 9 mm. — A single male. NB. I have no doubt that this species in congeneric with Mon- goma fragillima Westwood, Trans. Ent. Soc Lond. 1881, 364, Tab. XVII, f. 1 (from Mongoma Lobah, tropical Africa). Not only that the generic characters are the same, but even the coloring of the spe- cies has many points in common, as for instance, the prevailing of the white color on the legs. There is a slight diflFerence in the venation, the bases of the second and third posterior cells being in a line in M. tenera, while in M. fragillima the base of third p. c. is more drawn out in the proximal direction; the posterior crossvein in the former is a little before the discal cell, while in the latter it coincides with its proximal end. The other generic characters of the species before me may be defined as follows: General habit of a Dicranomyia, that is, its slenderness and delicate structure. Head small, rostrum short, palpi short, their last joint very short; eyes glabrous, separated by a narrow front; antennae 16-jointed; bent backwards, they would reach a little beyond the root of the wings; joints of the flagellum oblong, of nearly equal length, except the first, which is a little longer; short-verticillate ; prothorax well developed, prolonged in a short neck; mesonotum gibbous; abdomen elongated, slender, forceps of the male small, slightly incrassate; legs exceedingly long (the femora alone are about IV2 the length of the 90 C R. Osten Sacken: Diptera body) and slender; tibiae without spurs; ungues minute, empodia not per- ceptible; wings about as long as the abdomen; venation as explained above. There is another species still, which very probably belongs here; it is the Cylindrotoma albitarsis Dolesch. 2 Bijdr. 15, Tab. IV, f. 1 from Java. The likeness of the venation between Dr. Doleschall's and Prof. Westwood's figures is obvious, and consists principally in the immediate contact of the submarginal with the discall cell, involving the absence of the small crossvein, and in the presence of the two crossveins ') inside of the marginal cell. The difference between them is, that in Doleschall's figure there is one cell less; and assuming that this figure is correct, we may express this diff'erence by saying, that in Mr. Westwoods figure there are four posterior cells, in Doleschall's only three; or, should we adopt a different interpretation of the veins, that in Doleschall's figure the submarginal cell is wanting. Both alternatives represent a form of venation which is of very rare occurence among diptera, and we must suspend our judgment on this point, until we have an opportunity of seeing the insect from Java, described by Doleschall. But in the mean time, the presence, in the three species of the extraordinary crossveins in the marginal cell, the unusual length and slenderness of the legs common to them, and indicative of the habit of aerial dancing, (attributed by Doleschall to his G. albitarsis), the white tarsi, also common to the three species, all these characters tend to establish a very strong presumption in favor of their generic identity. ^) A fourth species , which may claim a relationship with the other three, is the Limnobia TrentepoJilii Wied. I, 551 ; Tab. VI, b, fig. 12 (Sumatra). Here, the analogy with Doleschall's figure is very striking: the long oblique crossveins in the marginal cell, only three posterior cells, and a very abruptly curved fifth vein; but the discal cell is open; about the structure of the species too little is said to allow any conclusion. The position of Mongonia in the system is somewhat doubtful. A Tipuhd with 16 -jointed antennae and without empodia and spurs, must be placed provisionally among the Liimnobina anomala. Para- ') I call them crossveins merely for shortness sake, because one of them may also be considered as a branch of the second vein, ^) Doleschall is probably wrong when he calls the antennae of his 0. albitarsis 14-jointed; in the same way he counted 16 joints on the antenna oi Dicranomyia saltans, which has only 14; and 16 joints on that of his Cylindrotoma ornatissima, while his own drawing, a copy of which I possess, shows 22 joints, that number being certainly much nearer the truth than the other. from the Philippine Islands. 91 tropesa singularis Schiner, Novara, Tab. II, f. 2 b, (South America), which I also refer to the Limnohina anomala, has the same crossveins in the marginal cell, the same contact between the submarginal and discal cells, and, like Mongoma, four posterior cells; but the sub- marginal cell is much shorter, and the position of the marginal cross- vein, with regard to the discal cell, somewhat different. The species, P. singularis does not have the length of legs, nor the light, aerial structure of Mongoma; it has distinct empodia, which Mongoma has not. Erioceraperennisn.sip. $ Q.. Five posterior cells; body black; abdomen whith four yelloiv crossbands; wings broivn, with a yel- lowish-white crossband. Length $ 15 mm. ; Q. (without ovip.) 18 mm. Head gray, beset with black pile; antennae yellowish -tawny, the tips brownish. Thorax brownish-black, more brown on the pleurae, beset with black pile; halteres blackish. Abdomen black; segments 2 — 5 each with a broad reddish -yellow crossband at the base; it is broadest on the 2"'^ segment, and narrowest on the S'*", where it occupies about one half of the breadth of the segment. The $ forceps (some- what injured in the specimen), seems to be brownish, the appendages at the tip are black. The segment bearing the ovipositor is red. Coxae black, femora yellowish -tawny with black tips; tibiae tawny with black tips; tarsi brownish tawny, the tips of the joints darker. Wings brown, yellowish at base, which color extends some distance along the costa, between the costal and the first vein; a yellowish-white crossband between the first and fifth veins, touching the proximal ends of the second submarginal and discal cells; an ill -defined yellowish- white space at the proximal end of the axillary cell. Five posterior cells; the petiole of the second rathes long. Marginal crossvein about the middle of the distance between the proximal end of the first sub- marginal cell and the tip of the first vein; the tip of the auxiliary vein almost opposite this crossvein. (I do not perceive this crossvein in my male specimen; I suppose that this absence is accidental). — One male, one female. NB. Two other specimens are a little smaller and have the legs and the antennae almost uniformly brown; the yellow crossbands on the abdomen are narrower, that on the second segment occupying only the proximal half of the segment; the yellow color at the base of the wings does not reach very far. Still another specimen (Q) resembles those two , but has the base of the femora and of the antennal flagel- lum yellow, and more yellow at the root of the wings. I suppose they are all varieties of JE. perennis. I also have some specimens 92 C R. Osten Sacken: Diptera which do not seem to have any yellow crossbands on the abdomen at all; but their abdomen is very much shrivelled and cannot be well examined. Eriocera mansueta n. sp. $ Q, Five posterior cells; body black-, genitals orange red; a yellow crosshand on the second abdominal segment; wings brown with a white crossband. Length : about 12 mm. Body brownish-black; antennae brownish-yellow, darker at base and sometimes at tip; a yellow crossband occupies the proximal half of the second abdominal segment; the other segments are shining at the base, velvet black, opaque on their distal half; genitals orange-red, as well as the segment bearing the ovipositor. Halteres dark -brown. Legs brown. Wings brown, with a white crossband between the first and fifth veins, close by the proximal end of the discal cell. Second posterior cell unusually small, and its petiole long in proportion. (I should not wonder if specimens occurred with only four posterior cells). — Two males, one female. NB. The antennae of this species and of IE. perennis , in the male, are of the short kind; not much longer than in the female. — Tipula pedata (Wied. A. Z. I, 45; Java). Two specimens from the Philippine Islands answer the description, with some exceptions: ,,Ein kleiner, fast viereckiger Flecken des Mittel- feldes" does not exist here. The thorax has three brown stripes; the middle one bears a longitudinal brown line. The front femora have a yellowish -white ring before the tip. The antennae are reddish-brown, the joints of the flagellum dark -brown or black at base. I do not recognize Wiedemann's description of the abdomen. Normal specimens of T. pedata must be compared in order to decide of the specific identity. This species has the complete venation of Tipula; the only peculiarity consists in the close approximation of the auxiliary vein to the first vein; it is with some diflficulty that the auxiliary vein can be seen at all. — • The antennae are 13 -jointed, the nasus distinct, the tibiae provided with short spurs etc. Pachyrrhina laconica n. sp. $. The black thoracic stripes are confluent; collare black; metanotum black in the middle, yellow on the sides; abdomen black, with yelloiu crossbands on segments 2 — 4. Length about 15 mm. (without ovip.) from the Philippine Islands. 93 Head, including rostrum, bright-yellow; antennae and palpi brownish- yellow. Collare velvet-black; thoracic dorsum black (the usual three stripes being confluent); moderately shining; a large yellow spot each side on the humeri; a smaller one between the thoracic suture and the black scutellum; metanotum with a broad brownish -black longitudinal stripe in the middle; yellow on the sides. Pleurae brownish-black, with several yellow spots: a large one between the root of the wings and the collare; a smaller one near the root of the halteres; a third one above the middle coxae. Halteres yellow. Coxae black, legs brown. Abdomen black; basal half of segments 2 — 4 yellow; at the base of the fifth segment also, some yellow is visible; the segment bearing the ovipositor, and the narrow one which precedes it, are yellowish-ferruginous. Wings with a pale brownish tinge, more saturate in the costal cell; stigma brown; second post. c. in contact with the discal. — One female. Pachyrrhina ortiva n. sp. $. Black thoracic stripes confluent; collare yellow in the middle; metanotum yellow, with a black spot posteriorly; abdomen black, ivith yellow crossbands on segments 2 — 3. Length about 13 mm. (without ovip.) — Head and rostrum bright orange-yellow; a well defined deep black spot on the occiput; antennae yellow, joints of the flagellum, except the first, black at base. Collare yellow in the middle, black on the sides; the usual thoracic stripes coalescent, shining black; a large yellow humeral triangle, has its lower hind angle cut off by the humeral furrow; a small yellow spot between the thoracic suture and the scutellum. Metanotum yellow; a large black transverse spot on its hind margin. Pleurae mixed of black and yellow, the black forming an irregular triangle in the middle. Halteres brownish-red. Abdomen black; seg- ments 2 — 5 yellow, each with a large semi-circular spot (or crossband attenuated on each side) occupying the whole hind margin ; the segment bearing the ovipositor and the narrow segment preceding it, are yellowish- ferruginous. Coxae yellow, with more or less black at the base, especially on the last pair. Legs more or less dark tawny; tips of femora and tibiae brown. Wings with a pale brownish tinge, which is more saturate in the costal cell and more diluted beyond the stigma; a slight brown shadow at the tip; stigma brown; Petiole of the second post. c. very short. — Two females. NB. At first sight, this species is very like the preceding one; it will be easily distinguished by the color of the metanotum and collare and other characters. Ctenophora suspirans n. sp. $. — Wings brown, with a white spot in the middle; scutellum black. — Length 14 — 15 mm. 94 C. R. Osten Saclcen: Diptera The whole body is velvet-black; head yellow, including rostrum and palpi, but the middle of the vertex black; a more or less large brown spot in the middle of the rostrum; some of the joints of the palpi infuscated; the scapus of the antenna is somewhat brownish or yellowish; the flagellum black; a broad yellow stripe occupies a large portion of the pleura; it begins in front of the root of the wing and ends above the middle coxa; above the upper end of this stripe there is a yellow spot on the mesonotum, which may be considered as the prolongation of the stripe; a more or less broad yellow band on the second abdominal segment; it is especially developed on the ventral side; legs black, with a white ring near the root of the tibiae. "Wings brown; a hyaline spot at the distal end of the first basal cell; it encroaches a little on the discal and sometimes also on the marginal cell. — Three males. NB. One of the specimens has the yellow portions of the thorax remarkably pale, almost whitish. Ctenophora idalia n. sp. $. — Wings brown, ivith a white spot in the middle; scutellutn yellow. — Length 14 — 15 mm. Very like C suspirans, only the scutellum, the base of the femora and the sides of the metanotum are yellow; the hyaline spot on the middle of the wings is larger, and encroaches considerably on the second basal cell, as well as on the marginal; there is a small triangular hyaline spot at the extreme proximal end of the two basal cells. — Rostrum anteriorly, face and scapus of antennae brownish -yellow; front above the antennae black; a yellow crossband reaches from eye to eye across the vertex; back of it, the occiput is again black; the root of the wings, as well as the basal portion of the halteres, are yellow. — One male (damaged). Ctenophora dolens n. sip. $Q. Wings unicolorous, hrown. — Length $ 12 — 14 mm., Q (without ovipositor) 15 — 16 mm. Whole body velvet-black, except the intermediate segments of the abdomen, which are reddish-yellow; wings uniformly brown; legs black, two basal thirds of the femora yellow; white rings near the base of the tibiae. Head dark brown, including the rostrum; antennae black or brown; in the male, each joint of the flagellum is whitish at the tip; palpi variable, pale yellowish or brownish ; halteres brown. The base of the abdomen is black; the three following segments are reddish-yellow; the end, including the genitals, is again black ; but the black at the base is variable in extent; in two of the specimens it emits a black dorsal and another ventral stripe, which encroach upon the yellow. — Two males, one female. from the Philippme Islands. 95 S c a m b n e II r a nov. gen. General appearance of Pacliyrrhina, from which however it differs in the venation. Rostrum short, with a distinct nasus; palpi long, with a long, whiplash-shaped terminal joint; antennae 13-jointed, once and a half longer than head and thorax together; first joint of the flagellum about twice as long as the first joint of the scapus, cy- lindrical; the following joints gradually decrease in length and have a very slight swelling at the base, which bears a couple of hairs; the whole flagellum is microscopically pubescent; the IS'*" joint is much smaller than the preceding one. Legs very long and slender, tibiae with minute spurs, which are more distinct on the last pair. Abdomen moderately club-shaped at the end; the forceps is provided with a pair of small, triangular foliaceous appendages, which resemble those of Pachyrrhina. Wings: the venation resembles that of Dolichopeza sylvicola, but the praefurca (very short in that species) is entirely obliterated here, and the great crossvein is posterior to the proximal end of the fourth posterior cell; the auxiliary vein is distinct and ends just before the stigma ; the anterior branch of the second vein is obsolete, and perhaps represented by a slight thickening at the distal end of the stigma; the discal cell is wanting; the veins, on the distal half of the wing, are finely pubescent. Fiff. 1. Scaraboneura dotata. The venation, the structure of the antennae and the slenderness of the legs, sufficiently prove the relationship of this genus to Do- lichopeza. As far as I remember, the Limnobia vittifrons Wk., J. Pr. L. Soc. V, 144 (Amboina), which I saw in the British Museum, is a Scamboneura, but I cannot recognise my /S. dotata in Mr. Walker's description. Scamboneura dotata n. sp. $ Rostrum and palpi yellow; front reddish-yellow with a brown line in the middle; vertex grayish; scapus of the antennae yellow, flagellum brown, except the distal half of each joint which is yellow; the extent of this yellow color gradually diminishes on each successive joint, so 96 C. R. Osten Sacken: Diptera that the last 4 or 5 joints are altogether brown. Thorax with three brown stripes, the intermediate one wedge-shaped, rather broad in front; the edges of these stripes are opaque, while their inner surface is shining, and shows a slight metallic lustre; the narrow intervals between these stripes, as well as a narrow transverse line on the prothorax, are pale whitish-yellow; the same color is more or less visible along the thoracic suture, especially in the middle; the portion of the mesothorax behind the suture, partakes of the color of the thoracic stripes; scu- tellum brownish, metanotum brown in the middle, yellow in the sides. The pleurae show a mixture of yellowish and brownish, and are slightly pruinose. Halteres with a brown knob. The abdomen seems to be variable in its coloring; in one of my specimens, which shows the color more distinctly, it is reddish-yellow, with a brown stripe along the su- ture on each side, and a series of large brown spots, one in each of the dorsal segments 2 — 7, the anterior and lateral sides of the segment remaining yellow; venter altogether yellow; in the other specimen the whole abdomen, including the venter, is reddish brown, except a row of bright-yellow spots along the back, on the anterior margins of the intermediate dorsal segments. I cannot say whether these diflFerences were produced after dissication, or represent varieties ; the specific identity cannot be doubtful. Legs pale tawn}', tips of femora and of tibiae brownish ; tarsi brownish towards the end. Wings hyaline, veins brown; stigma small, pale brownish, — Length 9 — 11mm. Two males. Bibionidae. Plecia fulvicollis Fab. Numerous specimens. Mycetophilidae. Sciara sp. One specimen. Cecidomyidae. A single specimen, belonging to Winnertz's group I (three longi- tudinal veins, the third being forked). Only three joints of the flagellum are present (the rest being broken), but these have a peculiar structure, slightly resembling those of Nephrotoma. Calicidae. Culex several specimens, damaged, Megarrhina, one male; determined by Walker as M. immise- ricors Wk., although abdomen and legs do not agree with his des- cription. It may be amboinensis Dol., although the agreement is not perfect. froin the Philippine Islands. 97 Tabanidae. Haematopota lunulata (Macq.) v. d, Wulp, Sum. Exp. Tab. I, f. 14. Haematopota sp.? All the specimens before me have the design on the wings like the above-quoted figure of Mr. v. d. Wulp; but some of them have the antennae reddish, except the latter part of the 3 '"'^ joint, which is black; and, at the same time, two whitish rings on the hind tibiae; the other group of specimens has altogether black antennae and only one white ring near the base of the hind tibiae. Neither of them agrees entirely with Macquart's description. Chrysops signifer Walk. J. Pr. Lin. Soc V, 277 (Bdtchian). I found the species thus determined and the specimens ( $ Q ) agree with the description. They vary in size very much. About Chr. unizonatus Rond. I took the following note when I saw the type in Genoa, a single specimen: ,,very like signifer Wk., only face altogether yellow; first abdominal segment yellow. May be only a paler variety." Chrysops dispar (Fab.) Wied. A. Z. I, 196. I believe C impar Rond. Ann. M, C. Gen. VII, 460, to be the same as dispar; I have seen the types. Tab anus. There are about a dozen species in the collection, most of which it would hopeless to recognise among the 120 described species of this genus from South-Eastern Asia, as they show no striking distinctive characters. Five of the species belong in the group with a very narrow ($) front, and a narrow frontal callus, coalescing with a linear prolongation above, a group abundantly represented in the Austro-Malayan Archipelago. Three species have the front and callus of the ordinary structure, and resemble, in their coloring, some european and N. American species. The two following species deserve a special mention. Tab anus van der Wulpi n. sp. $Q. Syn. Tabanus pictipennis v. d, Wulp, Tijdschr. v. Ent. XI, 100, Tab. Ill, f. 1, 2 (Celebes). Mr. V. d. Wulp's figure of this species is unmistakable; some dis- crepancies in the description are due to the fact, that he had a teneral, and therefore not fully colored individual. I owe this explanation to himself, after he had kindly compared one of my specimens with his own type. The name pictipennis being preocupied by Macquart XXVI. Heft I. 7 98 G. JR. Osten Sacken: Diptera (4. Suppl. 32), I take pleasure in dedicating this fine species to its first describer; his description I translate, supplementing it from my specimens. „Ochraceous, front very narrow, with a median blackish line; eyes glabrous; antennae testaceous [tip of the third joint black]; -anterior margins of [some of] the abdominal segments dark brown; legs black; wings with two brown crossbands; costal cells saturate yellow.^'' — Length: g 18 mm; Q 20-23 mm. Head ochraceous- yellow, with hairs of the same color on the underside; the front (Q) very narrow, linear, with a darker, raised, central line, which is only slightly expanded below. Head of the male of moderate size, flattened above; the dividing-line between the upper, large, and lower, small facets, very marked. Eyes glabrous, bronze- color, without markings. Antennae yellowish-red, the tip of the third joint black or dark brown; first segment drawn out in a point on the upper side; the second very short, prolonged above in a point; the third but moderately excised. Palpi reddish -yellow, beset with minute black hairs , mixed with fulvous ones in the 5 ; in the male there are some few black hairs at the tip only. Thorax and scutellum blackish, which color is entirely concealed under a dense ochre-yellow pollen; pleurae with ochre -yellow pile. Abdomen brownish -red, the hind margins of the segments beset with golden -yellow pile; the anteriour portion of the segments is more or less dark brown, the extent and intensity of this color varies in different specimens; generally the first and second segments have no brown ; on segments 3 — 6 , sometimes the anterior half, sometimes more, is more or less dark brown, the brown band being more or less distinctly narrowed in the middle. The male specimen has comparatively little brown. Venter, except at the base, dark brown or black; hind margins of the segments yellowish- red, beset with golden-yellow pile. Coxae of the same color as the thorax; legs dark- brown or black, with black pile. Halteres reddish- yellow. Wings: proximal third and especially the costal cells tinged with yellow; a brown spot, in the shape of a crossband, covers the central crossveins, coalescing anteriorly with the saturate yellow of the costal cells , and attenuating posteriorly without reaching the posterior margin; in the distal third of the wing a broad brown crossband reaches from the anterior to the posterior margin; its distal side shows a tri- angular grayish -hyaline excision, within the second submarginal cell; the proximal end of this cell, however, is brown; first posterior cell closed, petiolate at the end; anterior branch of the third vein without stump of a vein; (one of the specimens has a mere rudiment of a stump). — One male; four females. from the PlnUppine Islands. 99 Tahanus Iscion n. sp. $. Dark brown, abdomen and legs black; wings broivn; the tip and a part of the discal cell, hyaline. Length: 15 — 15 mm. Palpi and face dark-brown, with some black pile; head ($) flattened from above; the division between the large and the small facets very- distinct. Antennae dark brown or reddish-brown; third joint long and narrow; its upper angle projecting squarely; the excision of its upper side very shallow. Thorax dark brown, with black pile, especially on the pleurae; abdomen black, shining; legs black; halteres with a yellow knob. Wings brown, axillary angle paler; apex hyaline within the second submarginal cell, the proximal half of which is brown, a hyaline spot in the middle of the discal cell, both ends of which are brown; on both sides of that hyaline spot the brown ground color of the wing is somewhat yellowish; first posterior cell open, although somewhat coarctate towards the tip; no stump of a vein. — Two males. Stratiorayidae. Mosapha bicolor (Calochaetis bicolor Bigot, Ann. S. Ent. Fr. 1879, 189, Manilla). I have already said about the specimens (Enumeration etc. p. 26) from the Philippines that they differ from R. habilis Walker (Celebes) in having the brown stigma separated from the subapical brown cloud by a broad hyaline interval; the inter- mediate pair of spines of the scutellum is comparatively smaller. They may be a different species. NegritoTYiyia maculipennis (Ephippium maculip, Macq. D. E. IV, 54, Manilla). A dozen (g Q.) specimens. Seems to be a common and wide-spread species; the abdomen is more distinctly bluish than it was in the specimens from Ternate and New- Guinea mentioned by me in the Enumeration etc. p. 23. Acanthina azurea (Gerstaecker, Linn. Ent. XI, 334; Ceylon)? I am very doubtful about the determination of this species, as the description disagrees in several points. The vertex is black, not reddish; the front and hind tarsi are black or dark brown; the description of the pattern of the thorax disagrees etc. Three specimens. Sargus spec. One specimen. Closely related to, if not iden- tical with the species from Celebes which, in the Enumeration (p. 28) I called remeans Walk, with a doubt. Frontal triangle, face and antennae are more reddish; the front tibiae paler, the scutellum more bluish etc. 7* 100 C R. Osten Sachen: Diptera Ptecticus sp. A single sj)ecimen, which Mr. Walker had iden- tified with ,his Sargus rogans from the Aru Islands. Ptilocera amethystina Sn. v. Voll. — Three $, 6 $. The females have the anal and axillary cells and the proximal end of the fourth post. c. hyaline, while in the males these parts are brownish. In the specimens which I have seen from Celebes and New Guinea this character was not sexual; at least most of the females had no hyaline space in the anal portion of the wing. I am not satisfied yet about the specific distinctness of this species from P. smaragdina V. Voll. (Compare Enumeration etc. p. 24), Musama pauper Walk. J. Pr. Linn. Soc VII, 205 (Mysol). — A single specimen thus determined by Mr. Walker; but the description disagrees from it in many points. Leptidae. Atherios limbata n sp. Wings suhhyaline as far as the proximal end of the discal cell; tinged with pale brownish on the distal half. — Length about 9 mm. Front and vertex black , the former slightly whitish above the an- tennae; face black, with a whitish reflexion; antennae brownish-yellow. Thorax blackish-gray, whitish -hoary on the pleurae and with whitish reflexions on the mesonotum; humeri, the posterior part of the meso- notum and the scutellum brownish -yellow. Halteres yellow with a brown knob. Abdomen brownish -yellow; the base, a dorsal stripe on segments 2 and 3, and the greater part of segments 4, 5, 6, are dark brown (this is the case in one of the specimens; in the other the ab- domen is more uniformly brownish -yellow). Front coxae blackish, whitish-hoary; the other coxae brown; femora brownish-yellow, the hind ones with a broad brown ring before the tip; tibiae and tarsi dark-brown; intermediate tibiae yellowish-brown. Proximal half of the wings, as far as the proximal end of the discal cell, subhyaline; distal half pale brownish, gradually turning into grayish towards the tip; costal cell and surroundings of the stigma, yellowish. — Two females. NB. I. Atherix nigritarsis Dol. 3 Bijdr. 20 (Amboina) is closely related to this species, as I can ascertain, not only from the des- cription , but from an unpublished colored drawing in my possession. The principal difi'erences appear to be: the hind femora of A. nigri- tarsis have no broad brown ring before the tip; the scutellum is of the same color as the mesonotum; the abdomen has brown crossbands, and not a longitudinal brown stripe. fromri the Philippine Islands. 101 NB. II, Mr. Walker had labeled A. limbota with the generie .name Suragina Walk. I am not prepared either to maintain or to reject this genus; but it is certainly most closely allied to Atherix, which Mr. Walker did not even notice (J. Pr. Lin. Soc. IV, 110). It remains to be proved whether A. limbata is really congeneric with Suragina illucens (Celebes) the type of the genus. Chrysopila correcta n. sp. $. Wings suhhyaline, their distal half luith ttvo hroivn, sometimes nearly coalescent crossbands, which leave but a narrow hyaline margin between the apex and the third posterior cell. — Length 7 — 8 mm. Head yellowish-brown; sides of the face whitish; antennae brownish- yellow, third joint brown; arista brown, paler at base; palpi brown. Thorax brown, more or less yellowish on and around the humeri. Ab- domen reddish-yellow above, with ill-defined brown spots in the middle of the segments; venter brown. Thorax and abdomen are clothed with a delicate golden pubescence. Halteres reddish -yellow, with a brown ring before the knob. Front coxae yellowish; the other coxae brown; legs brownish-yellow, tibiae and tarsi slightly darker. Wings yellowish- hyaline; a brown cloud on the distal end of the anal cell; two broad brown crossbands on the distal half of the wing; their interval being narrow, they have one or more points of contact (so that in different Fig. 2. Chrysopila correcta. specimens this interval appears either as a subhyaline narrow cross- band, or as a series of irregular subhyaline spots); the edges of the bands are jagged; the proximal edge of the inner crossband begins at the anterior margin between the ends of the auxiliary and first veins; it ends in the fifth posterior cell, near the end of the fifth vein. — Two females. NB. In the structure of the face this species differs from the european species of Chrysopila; its middle portion is very large and projects over the palpi; the latter are very hairy. I cannot identify C. correcta with C. macidipennis Wk. J. Proc. Lin. Soc. I. 118 (Borneo), althought they have some points in common. 102 0. B. Osten Sacken: Diptera Chrysopila ferruginosa Wied. Auss. Zw. I. 224. Seven specimens of this species which is common in the whole Austro-Malayan Archipelago. These specimens have no dark incisures on the abdominal segments. (Compare my Enumeration etc. p. 31.) Chrysopila. Three other species of this genus are represented by single specimens in very bad condition. These species are small, have a blackish-gray body, clothed with metallic scales and subhyaline wings. Asilidae. Leptogaster princeps Q. Black, shining, with metallic bluish or purplish reflexions, especially on the abdomen; legs more or less reddish; wings brown with violet reflexions. — Length: 24—30 mm. Face silvery, except immediately above the mouth, where it is shining black; front and vertex black, shining; occiput grayish-silvery; antennae reddish -brown, second joint yellowish. Mesonotum black, shining, with a very slight bluish opalescence; a border of a light grayish, not very dense pollen runs above the dorso-pleural suture and also covers ihe scutellum and metanotum; pleurae subopaque, brownish- pollinose. Abdomen black, shining, with distinct bluish or purplish reflexions, some reddish shades on the ventral side vary in extent in different specimens. Halteres either altogether dark brown, or knob reddish. Legs more or less dark brown, with a very slight metallic purplish reflexion; hind tibiae more or less reddish, as also the end of the hind femora, where the reddish sometimes reaches beyond the middle. Wings brown, with purplish reflexions; proximal end of the second posterior cell but very little nearer the root of the wing than the proximal ends of the second submarginal and third posterior cells; contact of the fifth post. c. with the discal very short; anal cell closed, petiolate at the tip. — Three females, NB. This fine species diff'ers in several respects from the european species of the genus; the third antennal joint is more than three times as long as the scapus, narrow, almost linear, a little attenuated towards the tip; the two -jointed style is about one fourth the length of the third joint; the mystax is composed of a few weak, inconspicuous hairs; the anal cell is closed. The characteristic thoracic bristles of this genus are also quite conspicuous in the present species: I mean the praesutural bristle and the intra-alar, one on each side. heptogaster sp, — A single male. An inconspicuous species; mystax weak, as in the preceding species; anal cell closed. The an- tennae are broken. from the Philippine Islands. 103 Damalis. The characters of this geuus have been enumerated by Dr. Loew (Siidafr. Dipt. 107) and v. d. Wulp (Tijdschr. XIX, 140). I have five asiatic species before me; four from the Philippines, and one from Ceylon {D. fulvipes VVestw.). These species seem to differ from the african ones by their mystax, which consists of only four bristles, placed in a row above the oral margin, while in the african species the mystax seems to be more bushy and to extend farther up towards the antennae. However D. Felderi Schin. from Ceylon, has the mystax more like the african species; (I judge of all these species merely from the des- criptions). The facial swelling in all my species is very weak; it seems to be more prominent in the african ones. In D. fulvipes Westw. the contact between the fifth post. c. and the discal is merely punctiform (in other words, the fourth posterior cell is not petiolate); in the species from the Philippines that contact is moderately broad, (that is, the fourth post. c. has a petiole which is shorter than the posterior cross- vein). Mr. V. d. Wulp described D. marginata, which has the an- terior crossvein opposite the middle of the discal cell, and in which the veins, issuing from the discal cell (externomedial veins) are straight or nearly so. Usually however the anterior crossvein in Damalis is beyond the middle of the discal cell, and the externomedial veins, es- pecially the first, are more or less arcuated. ') The four species from the Philippines are more slender than D. fulvipes; the abdomen is flatter; the hind femora less stout; the same diff'erences seem to occur among the african species (comp. Loew, 1. c. Ill, note to D. capensis). The majority of the asiatic species have the hind femora armed with strong spines on the underside; however, D. nigella v. d. W., which I believe to recognize in one of my species from the Philippines, is without them; the absence of spines seems to occur more often among the african species. All my species have, on the underside of the middle tibiae, several (about four?) long, erect hairs, diminishing in length from the proximal to the distal end of the tibia. None of the species before me have, at the end of the middle tibiae, the prolon- gation (,,Zapfenartiger Fortsatz'") sometimes existing there; comp. for instance the descriptions of D. Felderi Schin. from Ceylon, and of D. speciosa Lw. from S. -Africa. I give below a synopsis of all the described asiatic species in- cluding my own; it must be borne in mind that it was drawn up merely from the descriptions of most of the species, and may therefore contain inaccuracies. ') Macqiiart figures the wing of D. tibialis as having the cross- vein opposite the middle of the discal cell; but is that figure correct? 104 C. M. 0-sten Sacken: Diptera Synopsis of the Asiatic species of the genus Dam a lis. I. Wings uniformly brown. Antennal scapus yellow; bind legs black; length V/i lines erythrophthalma Dol. (S-i^Bijdr. 19;Amboina.) Antennae black; length 3 — SVa lines. Body cupreous black furaipennis Walk. (List, VII, 765; Java.) Body reddish-ochraceous; femora black ; except at the base lugens Walk. (J. Pr. L. Soc. V, 237; N. Guin.) Body brown, grayish-poUinose; fem. red immerita 0. S. „ ,, ,, legs black fuscus Walk. (List etc. II, 481; Bengal.) II. Wings with the proximal half brown, the distal hyaline. Abdomen with metallic blue or purple reflexions tibialis Macq. (D.E.I,2,154;EastInd.) myops W. (A. Z. I, 417; Sumatra.) Abdomen yellow planiceps W. (A. Z. I, 417; East Ind.) fulvipes Westw. (Ann. Soc. Ent. Er. 1835; Ceylon.) Abdomen rufous ,,utrinque nigro-sub- maculatus" major v. d. W. (Tijdschr. XV, 143; Bor- neo, Sumatra.) III. Wings pure hyaline. Hind femora unarmed nigella v. d. W. (Tijdschr. XV, 143; Bel Menado.) Hind femora spinous vitripennis 0. S. IV. The coloring of the wings does not belong to any of the pre- vious groups. Small crossvein opposite the middle of the discal cell inarginata v. d. W. (Tijdschr. XV, 142; Bor- neo.) from the Philippine Islands. 105 Small crossvein beyond middle etc. Wings pale brownish-yellow. Abdomen reddish-yellow with black spots on each side maculata W. (A. Z. I, 416, Java.) signata Walk.') (Trans. Ent. Soc. Lond. N. S. V, 283; Burmah.) Abdomen reddish -yellow without black spots pallida v. d. W. (Tijdschr. XV, 143; Bor- neo, Sumatra.) Abdomen bronze color .... Andron Wk. ^) (List etc. 11,480; China.) Abdomen blackish-brown . . . Felderi Schin. (Verb. Z. B. Ges. 1866, 365; Ceylon.) Wings marked with brown near the anterior margin . . . grossa Schin. (Novara, 161; China.) on the apex siagonensis Bigot. ') (Ann. Soc. Ent. Fr. 1878, 443; Cochinchina.) Damalis immerita n. sp. $Q. Wings broivn; legs dark red; hind femora spinous on the underside; body dark brown, thorax with fulvous pollen on the sides. — Length: 12—14 mm. Face black, somewhat shining above the mouth; brownish poUinose under the antennae; the same pollen covers the front, except the ocellar tubercle; mystax black; antennae black; occiput with brownish-yellow pollen. Thorax densely clothed with pale fulvous, in some places brownish-fulvous, pollen; the disc of the thorax dull brown, which color forms a broad stripe in the middle, and two lateral stripes, interrupted by the pollinose suture. Abdomen dark brown, the base of the second segment and sometimes the hind margins of all the segments more or less reddish; male hypopygium brownish -red; venter grayish pollinose, with black spots on the sides of the segments; halteres brownish-yellow; legs, including the hind coxae, dark red; extreme tips of the femora black, especially on the anterior side; tarsi, especially the lasi pair, brownish; hind tibiae distinctly curved; hind femora stout, with a double ') I do not know about the position of the small crossvein of these three species. 106 C. R. Osten-Sacken: Diptera row of short, strong spines on the underside. Wings tinged with brown, which is slightly paler towards the posterior margin ; anterior crossvein beyond the middle of the discal cell; the proximal end of the second submarginal cell is but little more distal than that of the second pos- terior. — One male, two females. NB. This species can only be compared to fumipennis Wk., fusca Wk., and lugens Wk. But the former is said to have a „cu- preous black" abdomen, lugens black femora, except at the base, and fusca altogether black legs. Damalis vitripennis n. sp. g Q. Wings altogether hyaline; hind fetnora spinous; small crossvein beyond the middle of the discal cell; legs reddish, hind tibiae brown in the middle. — Length 9 — 12 mm. Face black, shining; its upper part, as well as the facial orbits, clothed with yellowish-brown pollen; the front is likewise pollinose, ex- cept the ocellar tubercle; antennae black. Thorax clothed with yellowish- gray pollen; a geminate broad brown stripe on the mesonotum, and more or less dinctinct lateral stripes. Abdomen clothed with brownish- gray pollen, the anterior portion of the segments being more grayish, the posterior more brownish; venter gray, with black, shining spots, one each side, on each segment. Hypopygium of the § yellowish-fer- ruginous; the last segment in the female black, shining. Halteres brownish -yellow. Legs yellowish, or reddish -ferruginous; the tarsi as well as the tips of the femora and tibiae are darker; hind femora more or less infuscated in the middle and provided with a double row of spines on the underside; hind tibiae curved. Wings pure hyaline, slightly yellowish near the root; anterior crossvein far beyond the middle of the discal cell; proximal end of the second submarginal cell considerably beyond that of the second posterior. — Four males, three females. Damalis nigella v. d. Wulp, Tijdschr, XV, 143 (Bel Menado). I have one specimen which agrees with the description. Damalis sp. One specimen, with brownish-yellow wings infus- cated at the tip. Damalina. This genus was introduced by Doleschall (Derde Bijdr. 19, in Naturk. Tijdschr. Nederl. Ind. Deel XVII, 91; 1858) for a species from from the Philippine Islands. 107 Amboina (D. laticeps). As Dr. Semper's collection contains two species of the same genus, I avail myself of the opportunity for characterizing it more completely. Closely allied to Damalis, but easily distinguisted by the structure of the third antennal joint, which is much longer than broad, lamelli- form, sublinear, and bears an arista at the tip, which is a little shorter than the joint itself; the joints of the scapus are short, bristle-bearing, the second subglobular. Minor differences from the five asiatic species of Damalis which I have before me consist in the following: the anterior crossvein is about the middle of the discal cell, and not beyond it; ') the fifth pos- terior cell is not in contact with the discal; the proximal end of the first submarginal cell is distinctly more proximal than the proximal end of the discal cell; the swelling of the lower part of the face is more abrupt, and the mystax consists of a greater number of bristles. The cilia of the posterior orbit, although very weak, are a little more developed here than in Damalis; the trochanters of the hind legs are less developed, the hind femora less stout and unarmed. The venation is very like that of Holopogon. D. laticeps Dol., of which I possess an excellent colored drawing, agrees in the generic characters with the two species described below. In the specific characters, it seems to hold the middle between them, as it has the brownish thorax of D. Semperi and the metallic -blue abdomen of D. cyanella. My specimen of the latter shows a remarkable peculiarity in its venation: it has only four posterior cells, instead of five, because there are only two veins issuing from the end of the dis- cal cell, instead of three. As I have only a single specimen, and as that specimen has only one wing left, I am not sure whether this peculiarity is not an accidental abnormity. Should it even prove a permanent character, it would not be a sufficient one for the formation of a new genus, as, in other respects, the agreement with C Semperi is perfect. I do not find Damalina mentioned in any of Dr. Schiners lists; it seems to have been overlooked since its publication. Damalina Semperi n. sp. g. Antennae black; arista reddish; head clothed with a fulvous pollen; thorax clothed with a fulvous pollen, or rather a microscopic fulvous pubescence; mesonotum dark brown in the middle, the outline of which color represents the usual thoracic, ') Damalis marginata v. d. Wulp, Tijdschr. etc. XV, 142 shares this character with Damalina. 108 C. R- Osten Sacken: Dlptera coaleseent stripes; sides of the dorsum fulvous. Abdomen brownish- fulvous, the middle portion of the segments, including the hind margin, more distinctly brownish. Halteres yellowish. Legs brown, shining, clothed with long fulvous pile; coxae fulvous-pollinose. Wings brown^ darker towards the base. — Two very imperfectly preserved specimens. — Length 6 — 7 mm. Damalina cyanella n. sp. Q.. Head black, grayish pollinose; antennae and mystax black. Thorax dark metallic-blue; humeri, pos- terior part of the mesonotum, scutellum and metanotum grayish-pollinose. Abdomen metallic-blue, shining above. Halteres with a brownish stem and a reddish knob. Legs black, shining, beset with black hairs, es- pecially the hind tibiae. Wings tinged with brown, the basal portion, before the discal cell is dark-brown, with a bluish reflexion. — A single imperfect female. — Length 6 — 7 mm. NB. I have already alluded above to the peculiar venation of my only specimen. The very narrow discal cell emits only two veins at its end, instead of three and thus there are only four posterior cells, instead of five. As the specimen has but one wing left, I am in doubt, whether this is a permanent character or an individual abnormity. Stichopogon peregrknus n. sp. Q.. Whitish-gray, front, vertex and mesonotum in the middle brownish; antennae black; mystax white; abdominal segments with brown spots in the middle; on the first seg- ment, the spot is small; on the second it is a large triangle, the base of which occupies the whole breadth of the posterior margin of the segment and the tip almost touches the anterior margin; the third seg- ment is almost altogether brown, except an interrupted, narrow margin anteriorly; segments 4 and 5 have brown triangles, like the second segment; segments 6 and 7 are nearly brown, like segment 3; segment 7 is grayish. Venter gray. Halteres yellow; the dark ground-color of the legs is entirely concealed under a gray pollen. Wings subhyaline. — Length 4 — 5 mm. — One male. NB. This species diifers from its european congeners (at least in the specimen before me) in having the fourth posterior cell not petiolate; it is subsessile, as its contact with the second basal cell is almost punctiform. Laphria. There are a dozen species of this genus in the col- lection. Their general character is very much like that of the Laphriae from the Malay Archipelago. Owing to the large number of species already described and to the insufficiency of many of the descriptions from the Philippine Islands. 109 it is in most cases impossible to determine the species without having type-specimens at hand. Laphria dimidiata Macq. Dipt. Exot. 1" Suppl. 72 (Philippine Islands). The description agreeing, and the locality being the same, the identification may be taken for certain. I suspect that L. Taphius Wk. List etc. II, 380 (Philippine Islands) is the same species, although the description does not mention the golden hairs on face and thorax. There are numerous $ and 9 specimens; it must be a commen species. Laphria partita Wk. J. Lin. Soc. IV, 105 (Celebes); 0. Sack. Enum. 40. The specimens (3 $$) were thus named by Mr. Walker; I have had occasion to compare them with the specimens of L. partita from Celebes mentioned in my „Enumeration," but did not reach any positive conclusion about their identity or diversity. Laphria Phalaris n. sp. §$. Ftdvous, thorao! with black stripes; abdominal segments 1 — 4 with black triangidar spots; segment 5 altogether black; wings with a brown apex. — Length 15—18 mm. Elongated and rather slender for a Laphria; fulvous, antennae of the same color; third joint slightly brownish, short -lanceolate in shape; mystax golden -yellow, proboscis reddish. Thorax with three broad subcontiguous black stripes; the intermediate one cuneiform, sub- geminate; the lateral ones abbreviated in front and interrupted at the thoracic suture j in the Q. these stripes occupy more space than in the male; sternum black, as well as some portions of the pleurae (more in the female than in the male); the intervals of the thoracic stripes, es- pecially behind the humeri, and also the metanotum, golden -sericeous. Abdomen with a small black spot on the first segment, a distinct tri- angle on the second; a still larger one on segments 3 and 4; segment 5 altogether black; the end of abdomen, as well as the genitals, yellowish- red. Halteres and legs yellowish-red; the extreme tips of the middle and hind femora infuscated. Wings bright reddish-yellow, with a well- defined brown apex, the proximal limit of which is immediately before the proximal end of the second submarginal cell; first posterior cell broadly open; crossveins, closing the discal and the fourth post. c. parallel, although not forming a straight line. — Three males and two females, NB. This species has a good deal of L. conchidens Wk. J. Pr. Lin. Soc. IV, 105; but the description of the abdomen disagrees; be- 110 G. R. Osten Sacken: Diptera sides, if it had been the same species, Mr. Walker would probably have identified it. L. Phalaris has the antennae of an Andrenosoina, without having the coloring, nor the other characters of that genus. Laphria pseudolus n. sp. $. Altogether reddish-fulvous; the darker color of the thoracic dorsum hardly visible under red- dish pollen and pile; legs yellowish red; wings uniformly light brownish-fulvous. — Length 22 mm. Antennae rufous, third joint linear, brownish at tip; mystax golden- yellow; proboscis rufous; thoracic dorsum with three broad, subconfluent, very indistinct darker stripes, almost concealed under a brownish-gray pollen and a dense rufous pile; lower part of pleurae and coxae golden- sericeous ; the black mesosternum is covered with yellowish pollen. Ab- domen uniformly rufous, with rufous pile. Legs yellowish -red; hind femora with a brown spot on the underside, not far from the coxa. Wings uniformly light brownish -fulvous; first posterior cell slightly attenuated at the end; the crossveins closing the discal and fourth pos- terior cells are parallel, although not in a line. — A single male. NB. I doubt that the brown spots on the underside of the hind femora are an essential character. ' Laphria scapularis Wied. A. Z. I, 516. Agrees with the description, but is larger. — Two females, in one of whom the two crossveins (closing the discal and the fourth posterior cells) are not exactly in a line; nevertheless I believe it to be the same species. Laphria sp. Exactly like the preceding, but the face with a bright reddish -golden mystax. Two males; in one of them the two crossveins (see above) form a straight line, in the other they are separated by a short interval. Is not the golden mystax a merely sexual character? Both Wiedemann and v. d. Wulp have described only females of L. scapularis. Laphria sp. determined by Mr. Walker L. dissimilis DoL? A single, damaged male. I possess an original colored drawing of L. dissimilis by Doleschall, and believe it to be a different, although closely resembling, species. Laphria, three species, represented by single specimens. 31 air a sp. A small, greenish -metallic species, with a golden face. A single specimen. i from the Philippine Islands. Ill Ommatius fulvidus Wied. A. Z. I, 420. Must be as common in the Philippines, as in Amboiua, Celebes etc. Ominatius; this genus is represented by six species, besides O. fidvidus. I do not attempt to unravel Ihem among the 40 species of Ommatius from Austro-Malayan Archipelago already described. Emphysomera aliena n. sp. §. Black, thorax with yellow- ish-gray pollen on the sides, tibiae reddish-yellow; wings fidiginous, except their axillary portion, which is hyaline. — Length 10—12 mm. Face and front with grayish-yellow pollen ; mystax dense, yellowish- white above the mouth; higher up scattered black hairs; beard yellow- ish-white; antennae black. Thorax above black, subopaque; pleurae, scutellum, as well as the sides of the mesonotuni with yellowish-gray pollen; abdomen black, subopaque, hind margins of the segments faintly reddish; hypopygium of the male black, shining above, reddish brown below; halteres reddish -yellow; all the femora, but especially the hind ones, black, shining; the latter with a row of spines on the underside; tibiae reddish-yellow; the hind ones infuscated at the tip; tarsi brown, reddish-yellow at the base. The anterior margin of the wings slightly expanded in the stigmatic region (§); the costal cell in the stigmatic region is dark-brown; the region behind it, inside of the marginal and first submarginal cells is tinged with brownish; the remainder of the distal half of the wing is fuliginous; axillary portion of the wing, in- cluding the second basal, anal and a part of the fourth and fifth pos- terior cells, hyaline. — Two male specimens. NB. The absence of the gibbosity on the face, the stout femora and the club-shaped abdomen vindicate this species as an Emphysomera. Dr.. Schiner was however mistaken when he said that the anterior alar margin of this genus is never expanded; Mr. v. d. Wulp has described a species which has such an expansion, and E. aliena is another. The abdomen of the latter is narrowest in the middle and expanded at both ends. Promachus manillensis Macq. D. E. I, 194 (Trupanea). Three specimens ($ Q). Promachus forcipatus Schin. Novara, 178. Four specimens (S 2). Promachus. One species resembles hifasciatus Macq. but is certainly different ; two or three other species are represented by very badly preserved specimens. 112 C. R. Osten Sacken: Diptera Philodicus longipes Schiner, Novara 179 (Philippine Isl.) Four specimens. Itamus, two Q. closely related to /. longistylus Wied., but front side of the hind femora black. There are about twenty other, badly preserved specimens, repre- senting about a dozen species, that belong in the genera Asilus, Proctacanthus and Erax, or in their vicinity. Bombylidae. Argyramoeha distigma Wied. A. Z. I. 309 (Syn. Anthrax argyropyga Dol. II Bijdr. 25?) My specimens are males, and therefore agree with Doleschall's description. Wiedemann had a female. The synonymy was suggested by Mr. v. d. Wulp, Tijdschr. XXIII, 166, and seems very probable. Argyramoeha sp. Similar to the former, but without the two black drops on the hyaline portion of the wing. Exoprosopa Oenomaus Rond. Ann. Mus. Civ. Gen. VIl, 37 (Hyperalonia). Exoprosopa flaviventris Dolesch. II Bijdr. 24 (?) Although the descriptions agree, I am by no means certain of the identification of the two above mentioned species. Both resemble Exopr. Doryca Boisduv. (Syn. ventrimacula Dol., Pelops Wk. leuconoe Jaenn.) very much, but differ as follows (if my identifications be correct): I. The brown color on the wing covers the proximal half of the discal cell; second posterior cell narrower at its distal end than at the proximal; venter with yellow pile in the middle; the white pile on the two last abdominal segments has the shape of crossbands. Oenomaus. II. The brown color on the wings does not encroach upon the discal cell. 1. A spot of snow-white pile on the ventral segments 2 — 4. Second post, c, much broader (more than twice) at its distal, than at its proximal end; the white on the two last abdominal segments has the shape of spots, rather than of crossbands. doryca. 2. Venter almost altogether clothed with yellow pile. Second post, cell very little broader at its distal end; the white on the two last abdominal segments is in the shape of crossbands. jiaviventris. Exoprosopa sp. Perhaps small specimens of Tantalus? frmi the Philipjnne Islands. 113 Therevidae. Thereva lateralis (Esch. Entomogr.) Wied. A. Z. I, 231. As Eschscholz's specimens came from the Philippines, and as this seems to be a common species, the identification is a very probable one, although there are some discrepancies; for instance the fourth abdominal segment is entirely black, shining, and without any gray posterior margin, Thereva sp. A single female, very like the preceding in colo- ring, but the fourth post. c. open and the front black, shining, except its lower part, which is silvery. Empidae. FAaphropeza exul n. sp. Q. Black, shining; mesonotum with microscopic grayish -yellow pile; pleurae and two basal abdominal segments smooth and very shining; the remainder of the abdomen dark brown. Proboscis ferruginous-brownish; palpi brown. Antennae: first and second joints yellow; the tip of the latter and the third joint brown; arista microscopically pubescent. Legs reddish-yellow, smooth; tarsi somewhat brownish; hind metatarsus a little swollen. Halteres pale- yellow. Wings with a slight brownish tinge, veins brown. Length: 2 mm. NB. I describe this species from a single, badly preserved specimen, on account of the genus to which it apparently belongs. Elaphropeza was hitherto represented by a single species, belonging to the north of Europe. JE. exul seems to share all the characters of E. ephippi- ata, as described and figured in Walker's Ins. Brit. Diptera, Vol. I, Tab. V. f. 4. Above the antennae, the eyes are separated ( Q ) by a space so narrow that it requires some attention to perceive it; below the antennae, the eyes may be called contiguous for an interval equal in lenght to the antennal scapus. The third antennal joint is shorter than represented in the above-quoted figure; the arista, on the contrary longer, about twice as long as the three joints of the antennae taken together; seen from the side, the outline of the eye shows a sinus of the lower occipital orbit not represented on the figure, and the inter- val between the lower corner of the eye and the root of the proboscis in broader; the tip of the first vein is beyond the middle of the wing; that of the second nearer the apex than it is on the figure. None of these difi"erences, it seems to me, has a generic importance. Sybos spec. Twe damaged specimens. Dolichopodidae. Psilopus vittatus Wied. A. Z. II, 217. Wiedemann had only the female; although Macquart, D. E. II, 2, 116 describes the XXVI. Heft. I. 8 114 C. R. Osten Sacken: Diptera male, he forgets to mention the broad black crossbands on the in- cisures of the abdominal segments, which distinguish it from the female. Seems to be a common species from the Philippines to Java. Psiiopiis longicornis Dolesch. 3^* Bijdr. 22 (Amboina). Agrees with the copy of Doleschalls original drawing, which I possess ; only in the description the word tibiis should be substituted for tarsi s. May also be the same as P. crinicornis Wied. if the latter has the gray cloud in the middle of the wings, which is not mentioned in the description. (Conf. 0. S. Enumer. 48). My ($) specimen has, on the upper side of the front tibiae, four erect bristles, and two si- milar bristles on the upper side of the first joint of the front tarsi. Psilopus. A dozen of specimens in bad condition represent several other species of the genus. JDiaphorus aeneus Dolesch. 1 Bijdr. 7, Tab. XII, f. 1. A single male. The original colored drawing by Doleschall, which I possess, convinces me that it is the same species. The eyes are se- parated by a very narrow almost linear front: all the pulvilli, but especially those of the front legs, are very large. The conspicuous bristles at the end of the hypopygium prove it to be a Diaphorus in the sense of Loew, Monogr. etc. II, 157. Diaphorus sp. $ $ With darker wings. than the preceding; abdomen metallic-blue with golden -green incisures. Two damaged specimens. Diaphorus maurus n. sp. $ Eyes of the male contiguous on the front; pulvilli of the front legs enlarged; body brown, with greenish-metallic reflexions; second abdominal segment brownish-yellow ; legs brownish-yellow; wings infuscated. Length 374 — 4 mm. Face, as well as the small interocular triangle above the antennae, whitish-hoary, although the ground-color is black; palpi brownish- yellow; cilia of the inferior orbit pale whitish-yellow; antennae brownish, third joint very short; arista inserted in an excision at its tip, and therefore nearly apical. The ground color of the mesonotum is dark metallic; dark purplish anteriorly, more or less covered with a delicate brownish pollen; greenish posteriorly; scutellum metallic green or coppery; pleurae black, grayish-hoary; abdomen brown, its second segment brownish-yellow, except its posterior margin, which is brown. froini the Philippine Islands. 115 Halteres yellowish brown. Legs brownish-yellow; proximal half of the middle tibiae infuscated; hind legs brown, except the proximal half of the tibiae which is yellowish; underside of the hind femora, on their distal third, beset with a row of rather long hairs. The usual bristles on the hypopygium comparalively short. Wings brownish , especially between the fourth vein and the costa; third and fourth veins parallel, the last section of the fourth is nearly straight, the flexure a little before its middle being almost obsolete; posterior crossvein almost in the middle of the wing. — Two males, NB. Diaphorus resumens Walk. J. Pr. Lin. Soc. Ill, 93 (Aru Isl.) is apparently a mixture of two different species; the female may perhaps be the same species as my D. maurus. Syrphidae. Syrphus striatus v. d. Wulp, Sura. Exp. 32, Tab. H, f. 3. Three males. It is almost impossible to determine the species of the difficult group of S. ribesii (to which the present species belongs), without the comparison of typical specimens; nevertheless I am almost sure of my identification, owing to Mr. v. d. Wulp's excellent description and figure. The abdomen is a little broader in my specimens, than the figure shows it to be, and the scutellum has, on its hind margin, a conspi- cuous fringe of black hairs, which I perceive in the figure although it is not mentioned in the description. The specimens were named by Mr. Walker S. consequens Walk. J. Pr. Lin. Soc. I. 18 (Singapore); that they disagree from the description is attributable, I suppose, to its careless wording rather than to a mistake in the identification. Syrphus, two species, both of the group of S. balteatus, but neither is identical with this species. South Eastern Asia seems to contain several species belonging in this same group, such as S. nec- tarinus W. A. Z. II, 128; alternans Macq. D. E. II, 2, 89; hetero- gaster Thorns, and pleuralis Thoms. Eug. Resa 497—498; triligatus Walk. J. Pr, Lin. Soc. I, 19, The true S. balteatus occurs in Su- matra (v. d. Wulp, Sumatra Exp. 33). I cannot identify my species with any of the above quoted descriptions; at the same time, the bad state of preservation of my specimens prevents me from describing them. Prof. Rondani (Ann. Mus. Civ. Geneva, VII, 423) identified a spe- cies from Borneo with S. neglectus Wied. A. Z, II, 134 (patria ignota). I compared his type in Genoa with Wiedemann's description and found that the identification cannot be sustained, being merely based on 8* 116 C. R. Osten Sacken: Diptera Wiedemann's latin diagnosis. As far as I can remember, one of my species is identical with that species of Prof. Rondani's. >^ Syrphus aegrotus (F.) Wied. (Compare 0. S. Enumer., 49). Three specimens, in two of which there is no hyaline space at the base of the wing, a case mentioned by Wiedemann already, as a variety. Sphaerophoria $Q, two specimens. V Baccha pedicellata Dol. 1 Bijdr. 9 (Java). One specimen, Saccha sp. A fragment; the species allied to B. pedicellata, but different. Baccha n. sp. A single male; differs from all the described asiatic species by its uniformly brownish wings. Ascia ^Tp. A fragment. Eristalis errans F. A dozen specimens (5§, 7 $ .) Eristalis. Three species, represented by one specimen each. HelophiliiS $Q, two specimens (in bad condition). Must re- semble alhiceps v. d, W., but cannot be the same species. Helophilus celeher n. sp. $. Eyes glabrous, separated by a moderately broad front; tliorax with four yellow stripes; abdomen red, with black triangles on the posterior part of seg- ments 2 — 4; legs yellowish-red; hind tibiae incrassate. Length 11 mm. Face silvery, descending straight in the profile from the antennae to the oral margin; a black, shining triangle above the antennae, en- closed between the silvery lower frontal orbits, which meet before the beginning of the narrow portion of the front, and assume there a more golden tinge; the upper, narrower part of the front is black, slightly yellowish -pulverulent in the middle; it gradually expands towards the vertex, where is a little broader than the ocellar triangle. Antennae bright yellowish-red; arista reddish at base, glabrous. Mesonotum with four yellow stripes , contiguous near the posterior margin , in such a way that the intervening three velvet black spaces end in a point pos- teriorly. Scutellum black (? soiled in the specimen). Abdomen red; frotm the Philippine Islands. 117 on the first segment a small transverse black spot on each side; on the posterior portion of the second and third a transverse black stripe attenuated on each side and reaching the lateral margin, expanded in the middle in the shape of an obtuse triangle; a black spot or spots, representing a vestige of a similar stripe, on the fourth segment; the large male hypopygium yellowish-red. Legs yellowish-red; hind femora strongly incrassate, brown at tip; hind tibiae strong, arcuate, brown, yellow at base, and with an obsolete yellowish ring in the middle ; hind tarsi brownish at tip. Wings with a yellowish tinge. — A single male. NB. The straight silvery face of this species, neither excavated under the antennae, nor gibbous above the mouth, will render it easily recognizable. Graptomyza. This genus was established by Wiedemann (Nov. Dipt. Gen. 1820; and A. Z. II, 206) for G. longirostris and brevirostris from Java. It is allied to Volucella; it has the same characteristic conical pro- longation of the face, with a distinct notch at the tip. The principal differences are: the structure of the head, the eyes being separated by a broad front in both sexes, and the venation. The latter resembles that of Ascia and Microdon in the rectangular curvature of the ends of the fourth and fifth veins; the second vein ends in the costa and not in the first vein; the so-called spurious vein is often absent (es- pecially in the group with a subglabrous arista); sometimes feebly marked. The scutellura shows a characteristic concavity in the middle of the disc. The abdomen is convex, in some species remarkably gib- bous; the dorsal plates, on the sides, are more or less curved under the abdomen, as in Volucella; but the ventral plates are much smaller than in that genus, the large intervals on both sides being occupied by the connecting membrane, (not unlike Calliphora). In the species of the group of (jr. ventralis the abdominal dorsal incisures are very little perceptible, so that the segments seem to be soldered together; this is much less the case in the group of the smaller species. The antennae have the first joint very short; the second but little longer (like the antennae of Rhingia and Volucella); the third joint is many times longer than the two first taken together, more or less linear in shape; the upper side in some species is distinctly concave in its outline, the lower one showing a corresponding curvature (see J. Proc. Lin. Soc. I, Tab. VI, f. 4c, the antennae of G. inclusa Wk,). The arista, inserted more or less near the base of the third joint, is either distinctly plumose, or microscopically pubescent; whether it is absolutely glabrous in some species (it is represented so in 6r. inclusa) I have not ascertained. 118 C R. Osten Sacken: Diptera The proboscis seems to be of different length in different species; the labella are long, slender and apparently very movable. The species inchisa, gibhula, meliponaeformis and brevirostris (Arista bare, or microscopically pubescent) are very much alike in coloring, and differ chiefly in the color of the scutellum and of the legs. In the same way G. ventralis, microdon, and some undescribed species form a natural group, provided with a plumose arista. But 6r. tibialis Wk. is said to have a plumose arista, although, on account of its coloring, it would belong to the first group; O. interrupta Wied. on the contrary, is said to have a bare arista, although its coloring would refer it to the second group. And thus a natural grouping cannot to be arrived at. For this reason I do not make use of the genus Baryterocera Walk. J. Pr. Lin. Soc. I, 123, Tab. VI, f. 4 with the species inclusa (Borneo) for type, which must be very like, if not the same, as O. brevirostris Wied. The following table is prepared principally from descriptions and is therefore liable to error. Synopsis of the Graptomyzae of the Indo-malayan Archipelago. Arista bare (or microscopically pubescent). Wings with black crossbands or spots. Femora black. Scutellum black gibbxda Wk. Scutellum yellow, w. black margin . meliponaeformis Dol, Femora yellow, with black tips. brevirostris W, inclusa Wk, Wings without black bands or spots. Prevailing color of the abdomen black interrupta W. Abdomen yellow, with a brown cross- band and brown spots .... literata u, sp. Arista plumose. Abdomen without longitudinal black stripes, A black stripe on the rostriform pro- longation of the face. Femora yellow ventralis W. Front femora with black bands , , tibialis Wk, No black stripe on the rostriform pro- longation microdon n, sp. Abdomen with longitudinal black stripes. Abdomen with more than three stripes longirostris W. Abdomen with three black stripes . . lineata 0. S, from (he Philippine Islands. 119 Graptomyza literata n. sp. Arista with a microscopic pubescence; abdominal segments 2—4 each with three large brown spots; wings subhy aline, slightly yellowish, unicolorous. Length about 4 mm. Face brownish-yellow, with a black stripe between the root of the antennae and the edge of the mouth; the sides (under the eyes) also black. Antennae reddish, upper edge of third joint brownish. Thoracic dorsum black, with a bronze-colored metallic reflection; humeral and postalar callosities honey-yellow ; scutellum black. Abdomen pale honey- yellow; the three blackish- brown spots on the second segment are contiguous, forming an uninterrupted crossband, whose posterior side is nearly contiguous with the incisure, and the anterior side projects in three lobes, the intermediate one of which is truncate at tip; on the third segment the three spots are subcontiguous ; the middle one square, the lateral ones oval and placed obliquely; on the fourth segment the spots are longitudinal, nearly parallel to each other, crossing the seg- ment like three broad stripes; a narrow brown border runs along the lateral margin from the second to the fourth segment, coming in contact with the brown spots on each segment which are nearest to it. Wings subhyaline, slightly yellowish, unicolorous; stigma yellow; veins likewise. Legs: coxae and femora blackish brown, tip of the latter reddish (to a greater extent on the first pair); tibiae reddish-tawny, black at the end; hind tibiae, except the extreme base, altogether black; tarsi reddish- tawny. — One specimen; female? Graptom,yza microdon n. sp. $Q. Arista plumose; ab- domen very gibbous; wings yellowish, unicolorous; legs honey- yellow, tips of tarsi and of front and hind tibiae black. — Length about 10 — 12 mm. (diflFicult to measure on account of the great cur- vature of the body). Face and rostriform epistoma pale honey-yellow; the latter sub- conically produced, distinctly gibbous, slightly brownish on each side; front more or less brown, yellowish immediately above the antennae; the latter brownish-red, darker along the upper edge of the third seg- ment. Thoracic dorsum yellowish -pubescent; ground color brownish) shining, with some metallescent reflections; humeral and postalar call- osities yellowish. Pleurae honey -yellow, with a shining black spot on the mesopleura, connected with the black, shining pectus. Abdomen black, shining, finely punctate and with more or less well marked brownish -yellow crossbands as follows: first segment brownish -yellow, witk a black mark on each side, near the hind margin; the anterior half of the second segment is occupied by a curved crossband, reaching 120 C. R. Osten Sacken: Diptera from the PhUippine Islands. from side to side, but attenuated at both sides, so as to leave the an- terior corners of the segment black; it is subinterrupted in the middle; a similar crossband on the third segment is much less distinct (in one of the specimens only its ends are visible, the middle remaining black); the sides of the third segment are brownish -yellow, but this color is partly concealed under a dense, short golden-yellow pubescence; a black triangle occupies the middle and end of the segment. The abdomen is very gibbous and the fourth segment is nearly as long as it is broad, almost circular in shape. Wings unicolorous, with a yellowish tinge; stigma of a more saturate yellow. — Two specimens. NB. Allied to G. ventralis Wied. (II, 207, .Java), which however has three black stripes on the rostriform epistoma, altogether black tibiae, a differently colored abdomen etc. O. tibialis Wk. J. Pr. Lin. Soc III, 95 and IV, 118 (Celebes) also seems to belong in this group, but has a black line on the ros- trum; ,, tibiae and anterior femora with black bands," The specimen from Java, mentioned by me in the Enumer. etc. 51 likewise belongs here, but has the femora (except at the tip) black. The color of the front and of the abdomen of 6r. microdon must be variable; it is different even in my two specimens. The gibbous abdomen and the shape of its fourth segment remined one of Microdon. Q-raptomyza spec; one specimen. Must ve&emhle G. ventralis Wied. II, 207 (Java) very much, especially in the characteristic yellow stripes, parallel to the lateral abdominal margin, on each side; but the proximal half of the femora is black, the tarsi altogether black; the rostriform epistoma has only a very weak median brown stripe and no perceptible gibbosity; the median yellow stripe on the abdomen is wanting etc. As it is evident that the species of this group are variable in their coloring, it is necessary to ascertain the possible limits of this variation, before describing many new species. (Fortsetzung im nachsten Heft.) re [Berliner Entomologische Zeitschrift Bd. XXVI. 1882. Heft II.] j/hc^x^^^ Diptera from the Philippine Islands brought home by Dr. Carl Semper, and described by O. M. Osten Sacken. (Fortsetzung aus Bd. XXVI Heft I ) M i 1 e s i a. South Eastern Asia, and especially the Indo-Malayan Archipelago seem to be the real home of this handsome genus. Thirteen spe- cies from the Archipelago have already been described; to these I add now three from the Philippine Islands; one more is known from Ja- pan. From the other parts of the world I know of only two european species and one north-araerican; a second north-american species, described by Macquart, may be merely a variety. The Milesia canu- sium Wk., from the Cape, does not seem to be a Milesia in the narrower sense; nor the M. bilineata Wk. List, III, 566 from New Zealand. Whether there are some true Milesiae among the South-American species referred by authors to that genus, I am unable to tell; by all means there are not many. When Rondani (N. Ann. di Bologna 1844) introduced the genus SpMxea for M. fulminans, restricting the genus Milesia to M. diophthalma, he was not aware of the existence of the genus Spilo- myia Meig. Illig. Mag. 1803, introduced for that very species M. diophthalma and which therefore must be retained for it. The arrangement proposed by Schiner to restrict Milesia to M. craWoniformis and fulminans and Spilomyia to M. diophthalma, vespiformis etc. is quite satisfactory, and should be retained; it has been explained at length by Schiner in his Diptera Austriaca, III, Syrphidae, p. 166 (Verb. Zool. Bot. Ver. 1857 ')• The identification of the thirteen indo-malayan species from the descriptions is somewhat difficult, because they are often closely allied and it is sometimes hard to decide whether the observed differences are ') It is only after the publication of Dr. Schiner's work that Rondani became acquainted with Spilomyia M.; he insisted never- theless upon his own arrangement. (Rond. Dipt. Exotica, in Archivio per la Zool. Modena 1863.) XXVI. Heft II. 13 188 C. JR. Osten Sacken: Diptera to be considered as specific or not. I have attempted to construct a Synopsis of these species, in using which it must be borne in mind that it was based principally on descriptions; the division: scutellum with, Or without a well-defined yellow margin, — especially, is somewhat vague. This table will at least help to recognize my own species and to indicate their affinities more clearly. Synoptic table of the species of Milesia from the Indo- Malayan Archipelago and the Philippine Islands. Hind femora with a spine. Scutellum without a well-defined yellow posterior margin. Thorax with more or less distinct yellow or gray longitudinal stripes. Face silvery; thorax with distinct yellow longitudinal stripes Diardi Voll. Face yellowish-sericeous; thorax with weak gray stripes Doriae Rond. Thorax without longitudinal stripes. Wings unicolorous ff^gas Macq. Apical quarter of the wings brown . apicalis Voll. Scutellum with a well-defined yellow posterior margin. Thorax with transverse yellow bands (yellow margin of the scutellum inconspicuous). Three yellow crossbands on the abdomen Rehnvardtn W. Only one yellow crossband on the abdomen Ritsemae n. sp. Thorax with longitudinal lines. The prevaling color of face, front and legs is black limhipenms Macq. The prevaling color of face, front and legs is not black. The two short longitudinal lines of the disc of the thorax are whitish fuscicosta Bigot. The two short longitudinal lines on the disc of the thorax are yellow. The three yellow abdominal crossbands are so broadly interrupted, that they appear more like lateral spots maadaris W. The three yellow abdominal crossbands are very little or not interrupted conspicienda Wk. from the Philippine Islands. 189 Hind femora without spine. Apex of the wings conspicuously darker JBigoti n. sp. Apex of the wings concolorous or only slightly darker. Thorax with three yellow crossbands. The third abdominal crossband is interrupted fiavifacies Bigot. All the crossbands are not interrupted Semperi n. sp. Thorax yellowish-sericeous anteriorly, with a longitudinal dark stripe, bearing a longitudinal yellow line in the middle Meyeri Jaenn. NB. Are not mentioned in this Synopsis: M. undulata Sn. v. Voll. (Japan), it has a red thorax, with a black design upon it; hind femora? Zamiel Wk. (Borneo) , which , if the hind femora are without spine, should be placed near Sigoti n. sp. vespoides Wk. (Singapore), with a very peculiar coloring of the ab- abdomen: ,,a broad luteous crossband, Avhich occupies rather more than half the hind part of the 2"^ segm. and the fore half of the S**.'' Hind femora? Is it a Milesia? Milesia Se7nperi n. sp. $Q. Ground -color of the face brownish -yellow, but concealed (except a glabrous stripe in the middle) under a yellowish -white sericeousness; oral margin, under the cheeks, dark brown or black. Front (?) gol- den-yellow pollinose, except a glabrous, yellowish -brown space above the antennae and a black, narrow stripe, connecting that space with the black vertex. In the g, the anterior end of the vertical triangle is yellowish sericeous, and the remainder black. Antennae brownish- red, third joint brown; arista brown, reddish at base. Thoracic dorsum dark brown, with three transverse, golden-sericeous stripes (at the an- terior and posterior margins and in the middle); the first is slightly interrupted in the middle. On the meso- and sternopleura two con- nected pale golden -sericeous patches, forming an irregular vertical stripe. Scutellum dark brown or black, with a narrow, yellowish edge. Abdomen black, with yellow uninterrupted crossbands at the base of segments 2, 3, 4; they are narrower in the middle (on the lateral margin they occupy a little more than one third, in the middle a little less than V* of the length of the segment); they are visible on the ventral side of the segments also; in the female, the first and second crossbands have a distinct notch on the posterior margin, in the middle, 13* 190 C. R. Osten Sacken: Diptera The remaining portion of the segments is deep velvet- black, opaque anteriorly, and black subopaque, or faintly shining posteriorly; the latter half of the fourth segment is more shining and sometimes reddish, as well as the g hypopygium. Halteres with a pale yellowish knob. Legs brownish -yellow, more or less mixed with brown; hind femora incrassate, especially in the male; without spine on the underside. Wings with a dingy brownish-yellow tinge, more brownish on the apical third, and more ochraceous along the costa; first basal cell subhyaline. Length 18—23 mm. — Two males, one female. NB. Must be very like M. jlavifacies Bigot (Borneo), from which it differs in having the third abdominal yellow crossband not inter- rupted ; moreover, Jlavifacies is said to have a yellow venter and me- tallic blue reflections on the abdomen. Milesia Bigoti n. sp, $Q. Face silvery, abdomen with alternating Hack opaque and bluish-black somewhat shining crossbands; a narrow, interrupted, obscurely marked yellowish- brown crossband on the fourth segment; hind femora without spine; wings reddish- yellow, apex infuscated. Length.- g 22 — 23 mm.; Q. 18 mm. Face silvery; cheeks shining black, as well as a spot above th^ oral margin, in the middle; frontal triangle in the $, silvery; vertical triangle black, its apex golden -sericeous; in the $ front and vertex are black; frontal orbits golden- sericeous. Antennae brownish -red. Thorax black, subopaque, with three narrow, golden -sericeous cross- bands (anteriorly; in the middle, along the suture; and posteriorly, before the scutellum); the first is a little interrupted, the second sub- interrupted; the sides of the mesonotum have a slight bluish -metallic reflection. Scutellum black, but little shining. A silvery sericeous vertical band across the meso- and sternopleura. Halteres reddish. Ab- domen black, opaque in the middle of the segments; at the base of segments 2—4 a narrow, shining black crossband, slightly interrupted in the middle and a little expanded at the sides, replaces the yellow crossbands that occur in the same place in other species (for instance M. conspicienda Wk., or Semperi OS.); on the fourth segment alone, the black, shining crossband bears an obscurely marked reddish, inter- rupted crossband in the middle; the posterior portions of segments 2—4 are more or less shining, on segment 4 sometimes obscurely reddish; all the shining portions of the abdomen have a slight bluish reflection, which is hardly apparent in some specimens. Femora black, reddish -brown at the end; the hind pair, above, have a blue metallic reflection, which is very bright in some specimens and hardly apparent from, the Philippine Islands. 191 in others; no spines on the underside; tibiae reddish -yellow, the hind pair brown in the middle; tarsi more or less dark brown, reddish at tip. (In my female specimen the four anterior femora are brownish-red, with very little black at the base.) Wings with a bright reddish-yellow tinge; more saturate anteriorly; the apex, immediately beyond the an- terior crossvein, is clouded with brown ; posterior margin pale grayish- brown. — Three males and one female. NB. The coloration of the wings of this species must be very like that of M. Zamiel Wk. (Borneo); but the black legs and antennae, and the two abdominal yellow crossbands of the latter prove that it is a different species. Milesia Ritsemae n. sp. Q. Face silvery, abdomen with alternating black opaque and shining bluish-black crossbands; a very narrow, interrupted reddish crossband on the second segment; hind femora ivith a spine; wings brownish-yellow. — Length 24 mm. Face black in the middle, silvery on the sides; front and vertex black, frontal orbits yellowish-sericeous; sides of the antennal tubercle yellowish, antennae brown. Thorax black, subopaque, with slight bluish reflections on the sides of the dorsum and on the pleurae; with three narrow, yellowish-sericeous crossbands; the first, between the hu- meri ; the second along the suture ; the third in front of the scutellum ; humeri whitish sericeous. Scutellum bluish -black, with a brownish- yellow rim. A yellowish-white sericeous vertical band across the meso- and sterno-pleura. Halteres reddish. Abdomen bluish-black, shining; black opaque in the middle of the segments 2—4; first segment me- tallic blue, shining; a narrow, obscurely reddish interrupted crossband at the base of the second segment. Front and middle femora yellowish- red, black at the base; hind femora bluish-black, reddish at tip; with a spine on the underside; front and middle tibiae reddish-yellow, clo- thed with a microscopic golden-yellow pubescence; hind tibiae brown in the middle, reddish at the ends; tarsi brownish-red, more brownish in the middle; the last pair dark brown. Wings with a brownish- yellow tinge, more reddish-yellow anteriorly. — A single female. Milesia sp. (a single male), is very like M. conspicienda Wk. (Celebes). The specimen of the latter (Q) mentioned by me in the Enumer. etc. 56, and now in the Museum in Genoa, is smaller, the yellow edge of the scutellum is less broad, the crossband on the se- cond abdominal segment is a little broader; the longitudinal thoracic yellow lines are somewhat obsolete anteriorly; the brown color of the 192 C. R. Osten Sacken: Diptcra costal portion of the wing is more distinctly limited by the third vein and not gradually evanescent etc. But all these diffei'cnces may be sexual, or individual aberrations. P i p u n c u 1 i d a e. Pipunculus. Grayish, antennae and legs yellowish; fourth vein furcate; a single damaged male specimen, different from the three asiatic species hitherto described (P. amboiualis Wk., J. Pr. L. Soc. V. 150, Amboina; armatus and abscissus Thomson, Eug. Resa, 514, China). Muscidae Calyptratae. The number of species of this division contained in the collection, is about forty. Among them are represented the genera Dexia, Pro- sena, Masicera, Miltogramma and several other Tachinidae; several Sarcophagae, Luciliae, Idiae, Pyrelliae and Muscae; a number of An- thomyiae and one Lispe. Unfortunately most of the specimens are in a very bad condition. I will content myself with enumerating the few species which I could name, or which I found already named in the collection. Musca conducens Walk. (J. Pr. Lin. Soc. IV, 138, Celebes). Was so named by the author, and may really be that species. Idia muscina Rond. (Syn. Stomorhyna muscina Rond. Ann. Mus. Civ. Genova, VII, 429; Borneo). It is not said in the description that the pale crossband on the second segment is interrupted; never- theless I believe the identification to be correct, as I remember seeing the type in the Museo Civico. Idia lateralis v. d. Wulp (Sumatra Exp. 44). A single, very badly preserved specimen, I am not quite sure of the determination, as the tibiae are brownish-yellow at the base only. Ochromyia ferrug Inea Dol. (2 Bijdr. 38, Tab. X, f. 3, Amboina). Sixteen specimens ( § Q ) ; the abdomen varying from dark metallic blue (testaceous at base only), to a uniform brownish testa- ceous. For the Synonymy, compare my Enumer. etc. 61 and Mr. v. d. Wulp, Tijdschr. etc. XXIII, 174. Luc ilia dux (Esch.) Wied. A. Z. II, 399. Seven specimens. Lucilia ditissima Walk. (J. Pr. L, Soc V, 245 (New-Guinea). So determined by Mr, Walker, although the most striking character of from the Philippine Islands. 193 the species, the contrast in the coloring, between the proximal and distal half of the wing, the latter being more brown than the former, is not mentioned at all in the description. Ten specimens. Lucilia fortunata Walk. (J. Pr. Lin. Soc IV, 137; Celebes). So determined by Mr. Walker. I believe it is L. nosocomiorimi Dol. A single specimen. Bhynchomyia indlca Rond. (Ann. Mus. Civ. Gen. VII, 424; Borneo). Two Specimens. Sarcophaga hrevis Wk. and sericeonitens^'k., so deter- mined by the author. Sciomyzidae. Sepedon javensis R. Desv. Myod. 677. I have four males and as many females, which agree exactly with an original colored drawing of this species by Doleschall, that I possess. The males alone have the front tarsi enlarged, and I do not understand why Macquart, D. E. Suppl. Ill, 59, attributes this character to the females also. Nor do my females have the oblique posterior crossvein, mentioned by Macquart, 1. c. On comparing these specimens with a single male, which I have from Sumatra (0. S. Enumer. 6d) I perceive that the latter has the distal third of the front and middle femora deep-black and the middle tibiae of the same color, the halteres whitish ; while the specimens from the Philippines have the extreme tips only of the fe- mora darker and the middle tibiae reddish; the halteres more yellow. Robinean Desvoidy's description („Tarses et tibias noirs") rather applies to the specimen from Sumatra. Mr. v. d. Wulp, whom I consulted on the subject, kindly informed me, that both forms occur among the nu- merous specimens in the Leiden Museum; that there were also tran- sitions between them; that the same form had been received from diffe- rent islands and different forms from the same island. For this reason he is of the opinion that until sufficient plastic differences are disco- vered, it is safer to treat these forms as mere varieties. I cannot but concur with this opinion. Psilidae. Chyliza selecta n. sp. $5. Front reddish tvith black orbits; thorax broivn, humeri, longitudinal stripe on the pleurae, and scutellum brownish-yellow; prevailing color of the legs yello- wish; apical third of the wings infuscated. Length 5—6 mm. 194 C. R. Osten Saeken: Diptera Head, including the antennae, reddish-yellow; in the middle of the face a black or brown spot, emarginate below, narrower above, not reaching the foot of the antennae, nor the peristoma; frontal orbits black, which color stops before the vertex (in a line with the ocelli); antennal arista plumose. Thorax brown, with a microscopic, appressed golden-yellow pubescence above; humeri and scutellum yellow; a brownish-yellow, often indistinct, stripe begins at the corner of the scutellum, passes above the root of the wing and stops at the thoracic suture, where it is a little curved towards the inside ; a similar, brownish- yellow, often indistinct, stripe along the dorso-pleural suture; pleurae brown, with a longitudinal yellow stripe in the middle, which stops between the root of the wing and the middle coxa. Legs brownish- yellow, including the coxae; front tibiae and tips of all the other tibiae brown; sometimes also more or less distinct brown marks in the middle of the femora. Wings subhyaline, the apical third brownish, in the middle of the wing this tinge nearly reaches the anterior cross- vein; it is much less extended near the margins. Halteres reddish- yellow. Abdomen brown, pubescent, sometimes the last segments yello- wish on the margins. Venation like Chyliza vittata M.; only the posterior crossvein less oblique and the anal cell a little shorter in comparison to the second basal. — Three males, one female. — Micropezidae. The best characters for the classification of this interesting family may be derived from the structure of the male genital appendages and the relative length and shape of the abdominal segments; but, unfor- tunately the shrinkage and distortion of these organs in dried speci- mens renders their study very uncertain. Next to these, the chaeto- taxy aflfords some good characters for the description of groups and genera. The chaetotaxy of the Micropezidae, as far as I can make it out from the small materials accessible to me, may be described as follows: All the genera that I have examined have one character in common, the absence of the ocellar pair of bristles. Tanypeza which has it, can hardly be considered a Micropezid. I. The two pairs of vertical bristles are present, although some- times far apart, on account of the development of the back head. The post-vertical pair is often, but not always, present. One fronto- orbital bristle is inserted a little below the ocelli, (in Grammicomyia. a little higher than the ocelli; I perceive none in Micropeza); and ge nerally one, or even two (Calobata territa n. sp.) lower down; some- times the latter bristles are very minute, (Nerius duplicatus.). h^om the Philippine Islands. 195 NB. The postvertical bristles arc absent in the european Calob. cibaria, ephippium, as well as in most of the Taeniapterae from South- Eastern Asia; it is remarkable that among the latter those with dark hind femora have them (Calob. eclipsis 0. S., tipularia Wk., mone- dula 0. S., nigripes v. d. W.); I also find them in the North American Taenioptera geonietra R. D. In Nerius fuscus the cephalic bristles are exceedingly small and remote from each other, on account of the longitudinal development of the head. II. No humeral; ivro posthumeral bristles in the european Calobatae (cibaria, ephippium), in the exotic Taeniapterae, in Grammi- comyia and Eurybata semilauta; I see only on e posthumeral in Micro- peza, Nerius (of the group of duplicatus, inermis etc ), and in Eurybata hexapla; in some specimens of Nerius fuscus I perceive a very weak second posthumeral; it is probobly very deciduous, because in mort specimens it does not exist. Two supra-alar bristles (the second and third); in Grammico- myia I perceive three. Two praescutellar (in some species there is a second pair in front). Two scutellar (four in Telostylus and Nothybus). III. The pleural bristles are represented sometimes by a single strong sternopleural bristle, above the middle coxae (Micropeza), or a weak one (Eurybata hexapla); sometimes there are two, three or more weaker bristles placed in a row (the european Calobatae); or a distinct fringe of numerous bristles (Taeniaptera). In Nerius I perceive no pleural bristles at all. The pile on the sternum, especially in front of the middle coxae, also varies in different genera, but is often difficult to observe; there is a great deal of it in the european Calobatae; a fringe of stiff bristles replaces it in Taeniaptera; in Eurybata only a few bristles are apparent. On the coxae, some characteristic bristles deserve attention: Taeniap- tera has a row of a few stiff bristles at the extreme front end of the fore-coxae, which, in Eurybata, seem to be replaced by a single hair. Before proceeding with the description of the species from the Philippine Islands, I will insert a notice on some little-known genera of Micropezidae from South-Eastern Asia, the types of which I have had the opportunity to examine in different collections. N othyhus Rondani, Annali Mus. Civ. Genoa VII, 439 (type, N. longithorax, Borneo), is represented by two specimens in the Museo Civico. It is a very remarkable form, which will be easily distinguished 196 G. R. Osten Sacken: Diptera by the enormous development of the thorax in front of the fore-coxae and the unusual position of the prothoracic stigma, dependent on it. Head not much developed behind the eyes; antennae: basal joints short, of the ordinary structure, third joint oblong; arista short- plumose; labella rather small. — Thorax unusually extended in front of the root of the wings and of the fore-coxae, so that its anterior portion is nearly twice as long as the posterior; the prothorax has a large develoiiment on the underside of that anterior portion, so that the prothoracic stigma is placed midway between the front coxae and the anterior end of the thorax. The scutellum is rather large, tri- angular, and bears four strong bristles; the metanotum is raised in the shape of a hump; the portion of the mesothorax in front of the scu- tellum and round the roots of the wings bears a number of strong bristles'). The legs are comparatively short (much shorter than in Nei'ius fuscus); the fore coxae are close by the middle coxae and in a vertical line unders the root of the wings. — Wings, auxiliary and first veins as in Calobataj the second is more distant from the costa, and its tip in very near the apex, far beyond the posterior crossvein ; the third and fourth veins are somewhat diverging; the third ends in the apex, the fourth exactly opposite the tip of the second; second basal cell closed; anterior crossvein not oblique. — Abdomen com- paratively short, the male genitals must be small and hidden, because I could not perceive the usual appendages of the Microspezidac. (I suppose the specimens to be males; Mr. Eondani does not mention the sex). Gramniicomyia Bigot (Rev. et Mag. de Zool. 1859, No. 7; Ceylon). Although closely allied to Calobata (Subg. Taeniaptera) it shows some well-marked plastic characters of its own, and may at once be accepted as a good genus. It is represented by a single species, G. testacea, a small yellow fly with a brown spot on each side of the front, I received it in two specimens thi-ough the kindness of Dr. C. A. Dohrn in Stettin. — It differs from the Taeniapterae of Southern Asia in its more slender shape, in the form of its head, which is comparatively large, more detached from the thorax, oblong, flattened from above, its vertical diameter being much shorter than the longitu- dinal; the head pi-ojects strongly in front of the eyes, in consequence ') At the time when I took this note in Genoa, I had not worked out my Chaetotaxy, and for this reason I cannot describe these bristles with more accuracy. from the Fhilippine Islands. 197 of M'liich the face is very much retreating. The antennae are rather distant at the base; the third joint narrow, linear, several times longer than broad; the arista glabrous. (I cannot perceive any pubescence with my strongest lens.) The thorax is proportionally longer, with a short, necklike prolongation in front, which makes the head appear more detached from the thorax, than in Taeniaptera. The prothorax forms a collar-like ridge, separated by a distinct depression from the mesonotum. — Grammicomyia resembles Taeniaptera in having a distinct clypeus, no transverse swelling on the upper part of the metanotum, a fringe-shaped row of hairs on the pleura above the middle coxae, etc. The venation is that of a typical Taenioptera; the anal cell oblique; the anterior basal crossvein nearly in a line with the posterior, a trifle more proximal; the tip of the second vein but very little more distal than the posterior crossvein; the first posterior (?ell very much attenuated at the end. The chaetotaxy likewise does not differ from the normal one of Taeniaptera: two vertical and two fronto- orbital bristles on each side; no postvertical; the occiput (very much in view, in consequence of the flattened shape of the head) is beset with short, black, pile; this pile also exists in Taeniaptera, but is less visible. The upper fronto -orbital bristle is inserted a little higher than the ocelli, on account of the unusually low position of the latter. Two posthumeral bristles; three supra -alar (in the Taeniapterae I know of, only two); one pair of praescutellar (far apart), and one pair of scu- tellar bristles. NB. In Mr. Bigot's description of G. testacea, a slip of the pen has occurred; in the second line, read vertice, for fronte; and fronte for facie. Telostylus Bigot, Rev. et Mag. de Zool. 1859, is also a good genus, which, in outward appeai-ance, somewhat resembles the smaller forms of Nerius (duplicatus, striatus etc.), but is easily distinguisted from them by the structure of the third antennal joint which is pointed, and bears the tomentose arista at the tip, and by the presence of four bristles on the scutellum, instead of two, the Anterior pair being much smaller than the apical one. In other respects, the chaetotaxy is the same as in those species of Nerius. The venation is that of Nerius; the tip of the second longitudinal vein is near the apex, far, beyond the posterior crossvein. Besides the T. binotatus Bigot, I describe below a second species, T. inaecus. Coenurgia rem! pes Walk. J. Fr. Lin. Soc. IV, 164, is a synonym of T. binotatus, published a few months later. 198 C. R. Osten Sacken: Diptera Anaeropsis Bigot, Ann. Soc Entom. Fr, 1866, 201, as I have shown in my note on the Diptera with an Achias-like development of the head, Ann. Mus. Civico di Genova 1882, Vol. XVIIl, is a true Micropezid, closely related to Nestiina. Not having seen any females, I cannot tell, whether they have the same extraordinary structure of the head, but I am inclined to doubt it. — Type: Anaeropsis hor- qidni Bigot. 1. c, Island Waigiou (Synonym: Phytalmia <]uttipennis Walker, J. Pr. Lin. Soc. V, 269; New Guinea.) The species not being a Phytalmia, will have to be called Anaeropsis guttipennis Walker, Mr. Walker's description being earlier. Tacniaptera Macq. , S. a B. II. 491, was without necessity suppressed by Macquart himself in the Dipt. Exot. II, 3, p. 240. As Loew has shoven (Loew, Beschr. Eur. Dipt. Ill, 255, and my Catal. N. Am. Dipt. 2** edit. p. 259), it is the same as Tanypoda Rond. (Rainieria Rond. olim) and the european Calob. latifrons and calceata, as well as a large number of exotic species, muss be referred to it. The true Taeniapterae from Southern Asia that I have seen, have the following characters in common, in which they diflper from the european Calobatae (sensu stricto): a microscopically pubescent, sometimes sub- glabrous arista not incrassate at the base; no transverse swelling on the upper part of the metanotum; the labella rather stout; a fringe of minute stiff bristles at the extreme front end of the fore coxae; a fringe- shaped row a bristles on the pleura, above the middle-coxae; a rather long and brod ovipositor of characteristic shape; a well-developed cly- peus; nearly obsolete tegulae with an almost imperceptible fringe of cilia; an oblique anal cell; the posterior crossvein and the tip of the second vein are at nearly the same distance from the apex of the wing (or, if the latter is nearer, it is less than twice as near as the posterior ci'ossvein). The eight species from South-Eastern Asia, which I mention below as Taeniapterae, all have white front tarsi, and the wings banded with brown. If I do not finally adopt Taeniaptera as a generic name, it is because there are several species which are neither Taeniapterae, nor Calobatae in the narrower sense, but about which I do not know enough to introduce for them separate genera. For this reason I con- tinue to maintain the genus Calobata in the widest sense, as I did in my EniMneration. The following table give a survey of the grouping of the genera of Micropezidae, as far as I can establish it upon my scanty materials. The american genus Cardiacephala is omitted, because I do not from the Philippine Islands. 199 know it. Calohata is taken in the widest sense, including Taeni- aptera and Grammicoinyia, which I have characterised above '). I. Antennal arista dorsal (inserted near the base of the third joint). A. Fore coxae inserted close ' by the two other pairs, but very far from the head, the thorax being conspicuously developed in front of them Nothybiis Kond. AA. Fore coxae inserted near the head, and at a more or less considerable distance from the two other pairs, a. The two hind pairs of femora without minute spines on the underside, near the tip. No crossvein between the second basal and the discal cells; a distinct sterno-pleural bristle Micropesa Meig. A crossvein between the second basal and the discal cells; no distinct sterno- pleural bristle; it is re- placed by more or less numerous hairs on the pleura, above the middle coxae Calohata Meig. aa. The two hind pairs of femora are beset, on the under- side, towards the tip, with a series of a very minute spines. Upper portion of the metanotum in the shape of a transverse swelling . . . Euryhata 0. S. Upper portion of the metanotum in the shape of a conical projection Head of the male with an enormous lateral develop- ment (Achias-like) . . Anaeropsis Bigot. Head of the male of an ordinary shape Nestima 0. S.Enum. ') Professor Rondani's genera Mimegralla, Grallopoda, fJrallo- myia, Orallipeza (Nuovi Ann. Sc. Nat. Bologna 1850; Osservazioni etc. pag. 16 — 19) were established for the most part in the absence of any specimens, merely upon comparison of Macquarts defective figures of the venation. Thus the genus GralUpeza is established for Calobata unimaculata Macq. Suppl. I. 215 (S. Amer.), solely because in the figure of the wing (1. c. Tab. XIX, f. 4) the crossvein closing the second posterior cell is omitted, although the absence of this cross- vein is not mentioned in the description, and very probably is only accidental. I do not think that genera established in that way can be taken into consideration. The wingless genus Calycopteryx Eaton, Transit of Venus Exp. Zool. Tab. XIV, belongs near Calobata. 200 C. B. Osten Sacken: Diptera II. Antennal arista apical or subapical. A. First antennal joint many times longer than the two others taken together hongina Wied*). AA. First antennal joint not longer than the two others, taken together. Third antennal joint truncate at the tip, with the arista on the truncature .... Nerius Fab. Third antennal joint pointed, with the arista on the point; scutellum with four bristles . Telo stylus Bigot. Of the ten species, contained in the collection from the Philippine Islands, five may be referred to Calobata in the wider sense; two to Nerius, one to Telostylus; for two species I form the new genus Euryhata. Of the five Calobatae, four belong to the group Taeni- aptera Macq.; the fifth must be referred to a diflferent group, for which however 1 am not prepared yet to introduce a new genus. For this reason I left all the five species in the old genus Calobata. In the analytical table that follows, the species mentioned in my Enumeration etc. are also included, because several new characters are for the first time introduced here. The terms anterior and posterior basal crossvein refer to the crossveins closing the second basal and the anal cells; compare Loew, Monogr. N. Am. Dipt. 1, p. XXIV, fig. I, litt. p, q. Calobata. I. The distance of the posterior crossvein and of the end of the second vein from the apex of the wing is nearly the same (or, if the former is greater it is less than twice as great as the other). ') No postvertical bristles; anterior basal crossvein a little beyond the posterior one. A golden, sericeous stripe runs from the mesopleura to the middle coxae. Antennae black .... cht^ysopleura n. sp. Antennae red galhula n. sp. ') Macrotoma Laporte (Ann. Sc. Nat. 1^^^ Serie XXV, 1832, p. 457, Tab. X, A.), from Cochinchina, is the same, or very nearly the same genus as Longina Wied., from Brazil. The descriptions and figures alone do not aff'ord sufficient data for a close comparison, ') The species of this group are Taeniapterae ; the other cha- racters, belonging to them have been mentioned above, on p. 198. from the Philippine Islands. 201 No conspicous sericeous stripe on the pleura. Front coxae and proximal third of front femora yel- lowish-red. Tip of hind femora red alhiinana Dol. Tip of hind femora black prudens 0. S. Front coxae and front femora black morhida 0, S, ^ Postvertical bristles present. Anterior basal crossvein a little beyond the posterior one; on the wings one brown crossband, besides the brown apex nigripes v. d. W. Anterior basal crossvein a little before the posterior one; on the wings two brown crossbands, besides the brown apex. Middle and hind femora brown with a distinct yel- lowish ring a short distance before the tip eclipsis 0. S. ') Middle and hind femora brown, slightly paler at tip, but without distinct yellowish ring monedula u. sp, II. The distance of the posterior crossvein from the apex of the wing is more than twice the distance of the end of the second vein to the same apex; postvertical bristles present'). Prevailing colors dark; the narrow wings have three brown crossbands and a brown apex; the anal cell cut off square; arista plumose on both sides; hairs at the end of the front coxae (?) ... tipuloides Walk. Prevailing color yellowish-red; wings unicolorous yellowish; the anal cell somewhat oblique; arista plumose princi- pally on the upper side; a single hair at the end of the front coxae tei^rita n. sp. Calohata (Taeniaptera) chrysopleura n. sp. §Q. Head dark metallie greenish or bluish; front with a broad, velvet- black spot, narrowed posteriorly, and reaching the occiput; upon it immediately ') I give up Calob. lunaria 0. S. Euumer. etc. 68, as preoccupied (C. lunaris Wied.), and call it C. edipsis. *) The two species of this division have only an artificial con- nection; both have a distinctly plumose arista and a traverse swelling on the upper part of the metanotum, under the scutelluni. 202 C. B. Osten-Sacken: Diptera behind the ocelli, there is a semicircular, pale golden- sericeous spot, which reflects the light in such a way, as to appear larger or smaller, according to the point of view; facial orbits j-eddish, or, in a certain light, silvery; palpi brown; antennae dark brown; third joint short, but little longer than broad, arista reddish at base, subglabrous (vestiges of a minute pubescence are perceptible in some specimens). Thorax dark metallic greenish, shining, more bluish towards the scutellum; on the mesonotum two subsolete stripes with a pale golden lustre, arising from a delicate pollen on the metallic ground color; they begin midway between the anterior margin and the mesonotal suture and run, with parallel sides, as far as the scutellum; their anterior ends are rounded off, and, at the suture, they are incised and somewhat interrupted; on each side, the interval between the stripes and the pleura is velvet black, which color also fills out the interval between the anterior end of the stripe and the humerus; on the mesopleura a large golden -sericeous spot is prolonged in the shape of a stripe towards the middle coxa ; metanotura yellowish -sericeous. Abdomen black, with slight bluish re- flexions; first segment pale yellowish sericeous; the second blackish on the proximal; the third on the distal half. Halteres with a brown knob; peduncle yellowish. Front coxae brownish, golden sericeous; front femora reddish -yellow at base; the remainder black, as well as the tibiae; front tarsi white, brown at the root only; the four hind legs yellowish-red; base of the femora more yellowish; three brownish rings on the femora, the one nearest the base being often the darkest; the two others generally subobsolete; tarsi brownish. Wings yellowish- hyaline; a pale brownish crossband covers the posterior crossvein; its sides are parallel ; the proximal side passes midway between the cross- veins; apex slightly infuscated, as far as the tip of the second vein; the infuscation often obsolete; first posterior cell very much attenuated towards the apex, although open. Length 10 — 12 mm. (without the ovipositor). — Five males, four females. Calohata (Taeniaptera) galhula n. sp. $Q. Exceedingly like C. chrysopleura, but very easily distinguisted by its bright yello- wish-red antennae. Front coxae reddish-yellow (and not brown, golden- sericeous), the four hind tarsi brownish-yellow at the base, brownish towards thfe tips; palpi reddish; the pubescence of the arista a little more distinct; the first segment of the ovipositor much shorter; a corre- sponding difference seems to exist in the anal appendages of the male, but I cannot make it out distinctly. NB. Calob. splendens Wied. II, 539 (also Schiner, Novara, from Ceylon) have many points in common with this species; still thorax and abdomen disagree. from, the Philipinne Islands. 203 Calohata monedula n. sp. Q Front ferruginous, vertex and occiput dark metallic blackish blue, as well as the fronto - orbital stripes, descending from the vertex on both sides of the ocelli; (in some specimens the metallic lustre disappears and the vertex appears only brownish); antennae black. Thorax black, with a slight bluish metallic lustre on the pleurae; humeri brownish; mesonotum clothed with a yel- lowish gray pollen , upon which two darker stripes are faintly percep- tible; the fan of hairs above the middle coxae is black; halteres dark brown; abdomen black, with slight bluish metallic reflexions and broad fuliginous crossbands; ovipositor brown, as long as the whole abdomen. Legs brown; front coxae sometimes reddish; front tarsi white; the root of the middle and hind femora yellow; ends of the hind femora yel- lowish-brown. The wings (Q) are not longer than head and thorax taken together; first posterior cell closed, but not petiolate; the anterior basal crossvein is a little nearer the root of the wing than the posterior one; a feebly marked brown crossband runs between the tip of the first vein and the anal angle ; another broader crossband has its straight 'proximal side immediately beyond the anterior crossvein; its ill-defined and somewhat convex distal side begins at the tip of the second vein and ends at the tip of the fifth; the extreme apex of the wing is also infuscated, but so that the interval between this infuscation and the second crossband is but little narrower than that crossband. Length (without the ovipositor) 8 — 9 mm. Three females. NB. This species will be easily distinguished by its short wings (at least in the female); its • very long ovipositor; the absence of the velvet-black spot on the ferruginous front; the position of the anterior basal crossvein, the comparatively short and slender legs, the hind fe- mora of which, very slender on their proximal half, are sligthly enlarged on the distal; the absence of a pale ring before the tip of the dark femora. It has a pair of post-vertical bristles. Calohata (Taeniaptera) nigripe s v. d. Wulp (Sumatra Exp. 54, Tab. Ill, f. 13). Agrees exactly with the description and figure, except that the thorax in somewhat bluish, and not pure black; the knob of the halteres is brown, but the peduncle yellowish; the abdomen) like the thorax, has bluish reflections. The arista on its proximal half, shows vestiges of a microscopic pubescence. A single female. Cdlohata territa n. sp. gQ. Yellowish -ferruginous, ab- domen darker; ivings yellowish, unicolorous, femora brown at tip. Length: 7 — 10 mm. Antennal scapus reddish-brown; third joint but little longer than XXVI. Heft. II. 14: 204 €■ R- Osten Sacken: Diptera broad, dark brown, except in the upper corner, under the arista, where it is yellowish; arista black, sligthly incrassate and yellowish at the base; plumose on the upper side only; front ferruginous, brownish around the ocelli, whitish -pollinose along the upper frontal orbit; the rest of the head, including proboscis and palpi ochraceous. Thorax yellowish ferruginous; abdomen ochraceous -brown; halteres yellowish. Legs yellow or reddish -yellow; tips of all the femora brown; tips of the four posterior tibiae and their tarsi brownish; the four hind femora are considerebly longer than the abdomen; the front femora (in the male) are less than half as long as the hind ones, and beset, on the underside with' a row of small spines ; those of the female are compa- ratively a little longer and have no spines. Wings yellowish, a little more saturate along the costa; the tip of the second vein is far beyond the posterior crossvein; the first posterior cell is considerably coarctate, but not closed; the anterior and posterior basal crossveins are in a line ; anal cell very little oblique. The male has a rather large ventral forklike appendage; the hypopygium itself is not large. The first segment of the ovipositor is about as long as the two preceding abdo- minal segments taken together. — One male, one female. • NB. The plumose arista, the presence of a transverse swelling under the scutellum, the very narrow clypeus, hardly projecting under the oral margin, the long second vein, the presence of only a single hair at the end of the front coxae and the absence of the fringe of hairs on the pleura, above the middle coxae (they are replaced by 3 or 4 slender hairs), distinguish this species from those of the genus Taeniaptera. There is a pair of postvertical bristles; the fronto- orbital are represented by a long upper one, and two lower ones, nearly as long as the upper one (at least it is the case in my female specimen); there are two posthumeral, a long scuteller pair etc. The first abdominal segment is shorter than in the Taeniapterae , and the first segment of the ovipositor of the female seems to be narrower at the base and broader at the tip, in other words to have more parallel sides (I say seems, because it is somewhat crushed in my specimen); the two posterior pairs of legs are comparatively longer. Eurybata nov. gen. Very like Nestima (0. S. Enumer. etc. 69); from which it differs in the structure of the metanotum, the upper portion of which, sepa- rated by a groove from the lower, has the shape of a transverse swel- ling, and not of a cone. The elongated, slender thorax, attenuate anteriorly almost in the shape of a cone, the long hind legs and long from the Philippine Islands. 205 narrow wings, are those of Nestima. The color of the two species described below is metallic or metallescent, while that of Nestima polita is dark brown. — The two pronglike ventral appendages of the male are less long and less rigid than in Nestima. I describe JE. heccapla as the type of the genus. E. semilauta is added, because it has the general shape aud many characters with E. hexapla in common, although by aud by, a separate genus may be established for it. The following description of the geueric cha- racters refers to E. heocapla; the differential characters of E. semi- lauta are added in brackets. Head comparatively smaller than in Calohata, slightly produced on both sides of the vertex, with a concavity between [semilauta: no perceptible concavity] , thus showing some resemblance to Cardia- cephala Macq.; cheeks narrow. Antennae: scapus short, third joint oblong, about twice as long as it is broad; arista short-plumose on both sides, but on its proximal half only [semilauta: arista plu- mose]; palpi slender; clypeus rather large, projecting [semilauta: palpi?; clypeus almost concealed under the oral edge]. • Thorax elongated, attenuated in the shape of a truncate cone in front; the mesonotum shows a slight shallow, transverse depression be- fore its anterior end; the transverse suture is beyond the middle of the mesonotum, well marked; scutellum triangular; metanotum with its upper portion in the shape of a transverse swelling, separated by a distinct transverse depression. On the pleura, the sub-alar suture is distinctly marked; otherwise mesopleura and mesosternum appear smooth and coalescent, the usual suture between them being obsolete. Abdomen elongated, slender; the pair of ventral appendages in the male slender, pointed, beset with minute hairs; ovipositor short, convex above [semilauta: ventral appendages of the male stouter at the base, then attenuated and button-shaped at tip; finely hairy; ovi- positor short, flat]. Legs: front pair short, inserted near the head, rather distant from the two hind pairs; middle and hind femora but little shorter than the abdomen, of nearly equal length, beset with minute spines on the underside, towards the tip. [semilauta: the middle femora are conside- rably longer than the hind pair.] Wings: narrow, comparatively long; second vein closely approxi- mate to the costa in its whole course, ending not long before the apex, and far beyond the posterior crossvein; first posterior cell somewhat attenuated towards the tip, although broadly open; posterior crossvein very near the posterior margin; anterior crossvein before the middle of the distance between the end of the anal cell and the posterior 14* 206 C'R. Osten Sacken: Diptera crossvein; the posterior basal crossvein (closing the anal cell) is very little oblique; the anterior basal crossvein (separating the discal cell from the second basal) is a little beyond the anal cell; the axillary angle of the wing is exceedingly small, not larger than the anal cell. [semilauta: wings of medium length and breadth; the second vein runs parallel to the costa; its tip is twice nearer to the apex than the posterior crossvein; third and fourth veins somewhat undulating; first posterior cell only slightly attenuated at tip; anal cell cut off square, therefore the posterior basal crossvein not oblique; the anterior basal crossvein a little before the posterior one; anal angle of the wing exceedingly small, smaller than the anal cell.] Chaetotaxy. The postvertical pair nearly in a line with the inner vertical; the outer vertical bristle is placed some distance from the inner one, above the eye; the fronto-orbital bristle, soon below the ocelli, is but little smaller than the vertical ones ; lower down a second minute fronto-orbital bristle, [semilauta: the postvertical pair has its normal position behind the inner vertical bristles; the second fronto- orbital is as large as the first.] On the thorax one posthumeral bristle, the posterior one, in its normal position, in the acute angle formed by the thoracic suture with the dorsopleural ; of the anterior posthumeral bristle I do not even perceive the scar; a distinct, long sterno- pleural bristle, a short distance above the middle coxae; two supra- alar, and a pair of praescutellar bristles, wide apart; scutellum with two long, approximate bristles at the tip. [seTnilauta: two posthumeral bristles; the sternopleural is replaced by a row of three or four very fine hairs; the rest as in hexapla]. The fringe of a few stiff bristles which exists in Taeniaptera at the front end of the forecoxae seems to be replaced here by a single hair; this must be verified however on better preserved specimens than mine are. Euryhata differs from Calohata (subgenus Taeniaptera) in its much more slender shape, especially of the thorax; the much shorter and narrower ovipositor; the filiform appendages of the ventral fork- like organ in the male; the very small anal angle of the wing; the long second vein and the presence of minute spines on the underside of the middle and hind femora, towards the tip. Euri/bataheccapla n. sp. $ Q. Metallic blue, legs reddish- yellow, wings with six brown crossbands and a brown apeoc. Length: 11 — 12 mm. Clypeus reddish, with blue metallic reflexions ; palpi yellowish-red ; antennae brown; front and vertex metallic-blue with violet reflexions; the former with a velvet-black, opaque stripe in the middle. Thorax from the Philippine Islands. 207 metallic-blue above, its anterior end, as well at two indistinct cross- bands, subopaque, blackish; pleurae and pectus shining light metallic- green. Abdomen shining dark metallic blue, with a subopaque blackish crossband in the middle of the segments. Legs reddish-yellow, front femora infuscated, except at both ends. Knob of halteres reddish- yellow. Wings hyaline, with six brown crossbands at equal intervals, and a brown apex. — One male, two females. — JEuryhata semilauta n. sp. $ Q. Thorao) ferruginous, abdomen brown, both with metallic-blue reflections; legs yellow; wings pale brownish-gray, with four hyaline spots on the distal half Length: 8 — 11 mm. Head ferruginous-red; vertex and the broad descending fronto- orbital stripes brown, with a strong metallic-blue reflection; between these stripes, the ocelli are placed on a narrow, velvet-black stripe, pointed posteriorly and bifid in front. Antennae brownish-red, arista black. Thorax ferruginous-red, shining, with slight bluish* reflections (in the male, the front part of the thorax is metallic-blue, as well as the scutellum and a portion of the mesonotum in front of it). Abdomen dark brown; strong metallic-blue reflections at the base and in the middle of the first segment, as well as on the two last segments; male genitals and ovipositor brownish-red. Halteres pale yellow; legs reddish yellow; front femora with a broad brown ring before the tip; a narrow and exceedingly faint brownish ring before the tip of the front tibiae ; tip of the hind tibiae and of the hind tarsi infuscated. In* the male the front femora, on the underside, have a fringe of long, soft hairs; on the underside of the tibiae a fringe of short, stiff microscopic hairs. Wings pale brownish-gray, more hyaline behind the fifth vein; four hyaline round spots form a square in the distal half of the wing; one is just in the middle of the wing, in the first posterior cell; another, in the corner of the second posterior cell, coalesces with the hyaline margin of the wing; the third corresponds to the second, between the second and third veins; the fourth in the first posterior cell, near the apex, has an irregular prolongation inside of the subraarginal cell, — A male and a female. NB . This species was determined Micropeza fragilis Wk. Pr. Lin. Soc. I, 37 (Malacca) by Mr. Walker; the short description of the wings agrees with my specimens, but not that of the body. Micropeza tenuis Dol. 3 Bijdr. 55 is a closely allied, but different species. Telostylus maccus n, sp. $. Reddish yellow, with black spots and stripes; antennae brownish-red, the tip of the third joint dark brown. Length (without ovipositor) 5—6 mm. 208 C R. Osten Sacken: Diptera Antennae reddish-brown, the distal half of the third joint dark brown, or black; arista white, except the root, which is black. On the head a black spot on each side, between the antenna and the eye; a brown streak on the facial orbit, and a large black spot on the ver- tex. Thorax with a blackish stripe in the middle of the mesonotum, interrupted before the suture; a deep black, subtrianguler spot behind the humeral callus; a smaller blackish dot between this spot and the suture; a large, rounded, deep black spot behind the suture and above the root of the wing; scutellum brown on each side, yellow in the middle; on the pleura, a dark-brown streak between the front coxa and the humeral callus; a large dark brown spot on the sternopleura, be- tween the front and middle coxae, and another on the hypopleura, above the hind coxae. On the abdomen a broad dorsal brown stripe, gradually attenuated posteriorly, and ending on the fifth segment. Halteres pale yellow. Coxae and femora reddish-yellow; tips of the femora bladk; tibiae and tarsi dark brown. Wings with a distinct yellowish tinge, which is more saturate along the costa; fourth vein arcuate, converging towards the third. — A single female. NB. T. tnaccus diflPers from T. Mnotatus Bigot (Syn. Coenurgia remipes Wk.) by the pair of large deep black spots behind the tho- racic suture, the brown sides of the scutellum etc. Nerius duplicatus Wied. (A. Z. II, 553; Java). — A single specimen which I have agrees very well with Wiedemann's description. I have already alluded to the difficulties attending the identification of species of this group from mere descriptions. (See 0. S. Enume- ration etc. 64). Nerius fuscus Wied. A. Z. II, 550. The coloring of the spe- cimens varies from that, described by Wiedemann, to an almost uni- form dark brown. The length of the second autennal joint is variable; in the males it is generally (but not always) longer than the third; in the females they are nearly of equal length. I feel more convinced now, than I was before, of the synonymy oifuscusVf., phalanginus Dol. and fuscipennis Macq. (see my Enumer. 63). Ortalidae. Scholastes cinctus Guerin. (For the synonymy compare my Enumer. etc. 91). This wide-spread species seems to be common in the Philippine Islands. The eyes, which I have revived on wet sand, are green, with three horizontal purple stripes. from the Philippine Islande. 209 Lamp roq aster spec. A single specimen. Notopsila {Pachycephala Dolesch., olim.) This is merely a new name for the genus Pachycephala ) Doleschall, 3 Bijdr. p. 43, the latter name being preoccupied several times. Notojjsila is closely allied to Euprosopia; the species of the former genus, show the following diflferences, that may be considered generic, from Euprosopia potens, Wk. and maculipennis Gu^r. The clypeus is entirely concealed; the distance between the roots of the antennae is greater, and equal to about one half the breadth of the vertex; the third antennal joint is shorter; in two of my specimens I perceive only one pair of very short vertical bristles, immediately above the eye; in the third specimen (N. sexpunctata) even that is wanting (broken off?); there are no other cephalic bristles. The scu- tellum is slightly emarginate at the tip, and three (sometimes four?) short bristles are inserted on the projection on each side of the emar- gination. (In the Euprosopiae the position of the three scutellar pairs of bristles is different; one pair on the apex, while the two other pairs are placed on the convex surface of the scutellum, the anterior pair being about the middle of the distance between the base and the tip of the scutellum). Of the other thoracic bristles I perceive a humeral and two posthumeral ones; two pairs of praescutellar bristles; the first supra-alar bristle, almost in a line with the praescutellar, a little on the side of the scutellar bridge; the second, above the alar frenum; they are all very short. (In the Euprosopiae the distribution in the same, except that the third supra-alar bristle, on the edge of the cavity, is also present, and that all the bristles are longer) ; no pleural bristles* — The face is flatter than in the Euprosopiae; the antennae are imbedded in the deep antennal furrows; the venation is the same; the three species have the same blackish gray color and mottled wings, as the two Euprosopiae; but they have besides, a fine golden yellow appressed pubescence, which that species has not. Doleschall's typical species and mine, may be tabulated thus: Antennae and tibiae black .... Mohnikei Dol. Antennae and tibiae red Face with two deep -black spots at the base of the an- tennae and four other spots besides sexpunctata n. sp. Face without black spots .... curt a n. sp. This Pachycephala has nothing to do with the Pachycephala Mus, Berol. mentioned by Loew in Monogr. Ill, 38. 210 C. R. Osten SacJcen: Diptera Pachycephala albifacies Dol. has red antennae and tibiae, but the black dots on the face are not mentioned in the description. It differs from the three other species in not having the fine golden pu- bescence, which distinguishes them all, and in having some indistinct longitudinal whitish stripes on the thorax. This last character makes me suspect that it may be a true Euprosopia, and not a Notopsila at all* Notopsila seospunctata n. sp. g Head yellowish-red, the middle of the face paler and longitudinally wrinkled; on each side of the vertex, near the eye, a comma-shaped, black depression; antennal scapus deep black; another black spot at the bottom of the antennal furrow below the tip of the antenna; a third on the facial orbit, at the same hight as the root of the antenna; the third joint of the latter is yellowish-red, about four times as long as it is broad; arista glabrous, brown, reddish at base. Thorax and abdomen grayish - black , micro- scopically punctate and chagreened, clothed with sparse, short, appressed gold en -yellow pile. Femora grayish -black, grayish -pollinose, the tips of the four posterior ones, as well as the tibiae yellowish -red; first tarsal joint yellowish-white; the others brown. Wings subhyaline, spar- sely mottled with pale brown spots, arranged longitudinally in the cells; some of them assume the appearance of irregular crossbands. Length 8 — 9 mm. — A single female. NB. The eyes, in life, are purplish green, with a single narrow longitudinal stripe near the fronto-facial orbit (revived on wet sand bv me). Notopsila curta n. sp. SQ. Like N.seoopunctata, only the facial black spots are absent; antennal scapus and base of third joint reddish, the rest pale brownish; the femora are altogether blackish gray, except the eoctreme tip ; the tarsi altogether yellowish- red; the broivn spots on the tvings are darker; a larger brown spot on the costa, extending to the small crossvein. Length about 8 mm, — Two specimens, NB. The brownish color of the vertex and of the interval between the antennal furrows in my male specimen, I look upon as accidental. I revived the eyes on wet sand; in the $ they appeared like those of N. sexpunctata; in the $ the longitudinal stripe was not visible. Adrama determinata (Syn. Dacus determinatus "Walk. J. Pr. Lin. Soc. I, 133; Borneo). I have seen the type in the Brit. Mus., without comparing it however with the specimen from the Philippine Islands. from the Philippine Islands. 211 The expression of the description: ,, three whitish stripes" docs not answer, as the corresponding stripes in my specimen are reddish; the abdomen is altogether red, and not „black above, at the base". JDacus cylindricus v. d. Wulp, Tijdschr. etc. XXIII, Tab. XI, f. 5 (Java) also agrees with my specimen remarkably well 5 the differences are: the brown oral border is divided into two distincts spots; there is no black spot on the occiput; the scutellum has a black triangle in the middle, and not a black base only: the first abdominal segment is red, like the rest of the abdomen and not black. Are these different species or varieties only? It is impossible to decide such questions without the actual comparison of specimens. The same remark applies Adrania selecta and the synonymy adduced by me in the Enumer. etc. p. 91. Rivellia fusca (Syn. Herina fusca Thomson, Eug. K. 575; Manilla). The yellow spots at the base of the abdomen are invisible in some specimens. There is some obscurity in the description of the design on the wings; (nervus humeralis?) — Ten specimens. NB. This is a true Mivellia in the sense of Loew , Monogr. Ill, p. 87; 1. c. p. 44, at the bottom. Dr. Loew mentions the occurence of Rivelliae in South-Eastern Asia, and says that they differ in having the 3^ joint of the antennae a little shorter ; I do not perceive this difference, Stenopterina. From notes, taken in different collections, as well as from descrip- tions, I have drawn up the following table of the species from the Malay Archipelago', which may be referred to the genus Stenopterina in Loew's sense. At present, I have only specimens of S, calcarata, eques, aenea (?). chalybea and didyma before me, and therefore cannot verify all the statements of this table. I. Scutellum with four bristles; tip of the first vein nearly opposite the posterior crossvein; third and fourth veins converging. In the $ a large spine on the hind trochanters. Metallic blue, with a brown margin on the costa, and in- fuscated crossveins calcarata Macq. (D, E. II. 3, 207.) Hind trochanters in the $ not spinose. First basal cell brown; small crossvein distinctly oblique. The brown of the first basal cell stops short at the antei-ior crossvein . , . . aenea Wied. (A, Z. II, 513.) 212 C. R. Osten Sacken: Diptera The brown of the first basal cell continues along the fourth vein, as far as the posterior crossvein eqxies Schin. (Nov. 288.) First basal cell hyaline. Wings with a brown margin along the costa, other- wise hyaline; anterior crossvein oblique. Thorax with three yellow stripes zonalis Rond. (Ann. Gen. VII, 430.) Thorax without such stripes marginata v. d.W. (Tijdschr.XXIII,179.) Wings without a brown margin along the costa, but with the crossveins and apex clouded with brown. Femora metallic -green; anterior crossvein not oblique didi/nia 0. S. (Enumerat. 77.) Femora yellow .... flavipes Schin. (Nov. 288.) II. Scutellum with six bristles; tip of the first vein much more proxi- mal than the posterior crossvein; third and fourth veins not con- verging. chalyhea Dol. (3 Bijdr. 53.) hataviensis Schin, (Nov. 288.) obtrudens Wk. (J. Pr. Lin, Soc. Ill, 116.) In this table jlavipes Schin. and obtrudens Wk. are placed hypp- thetically, as regards their venation. The question whether hataviensis Schin. is merely a variety of chalyhea Dol. (Comp. my Enumer. etc. 78) is left undecided. The Herinae grandis, limpidipennis and nigro- costata of Doleschall (Bijdr. 3) may also be Stenopterinae; I do not know them. Stenopterina calcarata (Syn, Herina calcarata Macq- D. E. II, 3, 307; East Indies). Loew says about it (Monogr. etc. III, 47) : „perhaps not a true Stenopterina, but closely related to that from the PJiilippine Islands. 213 genus." The transverse impression, connecting across the dorsum the thoracic sutures on each side, in the typical St^uopterinae , is hardly apparent here; the third antenna! joint is comparatively shorter. The chaetotaxy is the same, only the occipito- orbital bristle, apparent in St. eques does not exist here; praescutellar bristles exceedingly weak. The vertical diameter of the head is longer, the front being higher, than in St, eques. The large spine-like processes on the hind trochan- ters of the male are a peculiar feature; they are not found in the fe- male, — A dozen specimens. Stenopterina chalyhea (Syn, Herina clialyhea Dolesch. 3''" Bijdr. 53, Amboina). Conf. 0. S. Enumer. 78. The abdomen has broad purple bands at the base of the segments, which two specimens from Ternate, also in my collection, have not; a third one howewer has them. The color of legs and palpi is variable between reddish and brown. — Three specimens. Stenopterina aenea (Syn, Dacus aeneus Wied. A. Z. II, 513, Java). The wings agree, but much less the body. I have no authentic S. aenea at hand for comparison. Front dark ferruginous; front coxae and femora rufous, the latter especially on the front side; arista short-pubescent at base; thoracic dorsum brownish pollinose; the deep thoracic furrows on each side are free from this pollen and there- fore very conspicuous. The abdomen more slender than in S. eques; on each side of the first abdominal segment three erect bristles (do they exist in S. eques? I do not perceive tham in my specimens); the color of the abdomen is a shining metallic green; more opaque in the 5 , the 5^^ segment of which is again more shining. Aiitiiieura. 0. Sacken, Bullet. Soc. Entom. Fr, 10. Aug. 1881. Will be easily recognized by the unusual position of the anterior crossvein, which is in one line with the posterior one, and by the structure of the antennae, which resemble those of Loococera, The auxiliary vein is almost coalescent with the first vein, and, in this repect, Antineura differs from the majority of Ortalidae. Head as broad, or a little broader, than the thorax; the profile projects considerably in front of the eyes; lower occipital orbits turgid; upper part of the occiput flat and smooth, forming a sharp edge with the vertex. Face but little retreating, straight, rather long (the base of the antennae occupies about the middle of the profile of the head). Viewed 214 C R, Osten Sacken: Diptera in front, the face is a little narrower above than below, antennal foveae deeply marked, descending down to the peristomium, divergent, leaving but a narrow orbit between them and the eyes; the interval between the foveae is smoothly convex; cheeks narrow. Oral opening large, nearly circular, clypeus generally with- drawn; peristomium almost imperceptibly arched in front but not up- turned; palpi elongated, narrow, flattened. Front broad, gradually narrowed towards the vertex, its sides forming gentle curves (the boundary of the eyes, on both sides, forms a figure not unlike a lyre, contracting upwards, and then expanding again on the top of the vertex); lower portion of the front turgid; the lunula occupies nearly one-third of the breadth between the eyes. Ocelli not far from the edge of the vertex. Eyes glabrous, descending very low (hence the narrow cheeks); in life, they are uniformly green, changing into purple. Antennae: scapus small, third joint very long and narrow, linear, reaching beyond the peristomium ; arista about once and a half the length of the third joint, finely and densely pubescent (white in both species described below). Thorax about twice as long as it is broad; lateral transverse suture rather deeply marked, connected by a transverse depression. Scutellum a little broader than long. Chaetotaxy: Head, only two pairs of vertical bristles of mode- rate strength; the rest wanting. Thorax: no humeral bristle; post- humeral, two; supra-alar, three; antescutellar, two; mesopleural one. Scutellum, six bristles. Abdomen elongated, slender, about as long as head and thorax together; without any bristles; four segments, the first being the lon- gest; the second of the same length as the third; the fourth a little longer. The male hypopygium is almost withdrawn in the fourth seg- ment. In the female, the abdomen is broader in the middle than at the ends, the first segment of the ovipositor flattened, triangular; the tip of the ovipositor is slightly enlarged and bears two pairs of micro- scopic hairs. Legs, of moderate length and strength; the hind femora not in- crassate; front coxae rather long, moveable, inserted very near the neck. Tegulae represented by a narrow strip. Wings. Costa and first vein beset with short hairs; third vein with a series of minute bristles on its proximal half; auxiliary vein closely approximate to the first, ending in the costa a little before the middle of the wing; beyond this spot, the first vein converges very gradually towards the costa, forming a long and exceedingly narrow stigmatic costal cell, from the Philippine Islands. 215 with an ill-defined ending. The second and third veins are almost coalescent at their bases and begin to diverge only a short distance before the end of the auxiliary vein ; in their further course, they are unusually near each other, as well as to the costa, thus forming rather narrow marginal and submarginal cells. The fourth vein is compara- tively distant from the third, and hence, the first basal cell is unu- sually broad at its proximal end; the anterior crossvein forms a straight Fig. 3. Antineura stolata. line with the posterior one, the latter having its usual position ; hence, the anterior crossvein becomes unusually long, of about the same length as the posterior. The end of the fourth vein is gently curved towards the third. The fifth and sixth veins are nearly straight. The second basal and anal cells are of moderate size and of equal length; the crossveins closing them are straight ; the lower distal angle of the anal cell is slightly obtuse. The general habitus and the coloring of Antineura as well as many details of its structure, prove its relationship to Stenopterina; its position in the same group is also proved by the absence of the prothoracic and sterno-pleural bristles. The differences are obvious, and consist principally in the structure of the head (Stenopt. has a large clypeus, a narrower, hardly prominent front, a face concave in profile, fronto-orbital bristles etc.) and the venation (indistinct auxi- liary v„ position of anterior crossvein ejtc.) The name Antineura alludes to the position of the crossveins. Antineura stolata n. sp. $ Q. Metallic greenish-blve, thorax with faint gray stripes; femora brown, mixed with red; length 13 — 16 mm. Metallic greenish -blue, moderately shining on the thorax, more so on the abdomen; face black, facial and frontal orbits white; occiput whitish-poUinose below, black above. Antennae: second joint reddish, third brown; arista white, yellowish at base; bottom of the antennal 216 C. B. Osten Sacken: Diptera foveae grayish-pollinose. Thorax with three faint grayish-pollinose stripes; the middle one often hardly perceptible; the lateral ones, pla- ced immediately above the dorso-pleural suture, have on the inner side, an irregular outline ; pleurae grayish-pollinose and tomentose ; scutellum and methathorax likewise, but slightly. Abdomen with a short, delicate, moderately dense, whitish pubescence. Halteres reddish. Front coxae with a dense silvery-gray sericeousness; front legs brown, femora more or less reddish above; similarly the other legs are brown, but the femora more or less mixed with reddish. Wings almost hyaline; (Fig. 3) a brown crossband runs across the two crossveins and is continued along the costa to the apex; between the stigma and the fourth vein there is a large brownish-yellow spot, which, gradually attenuating, runs towards the root of the wing. Two males and four females. Antineura sericata n. sp. $ Q. Metallic-green, iliorax luith three golden-yelloiv sericeous stripes; femora yellow; length 8—15 mm. Front metallic-violet above the antennae, blue towards the vertex; facial and frontal orbits golden-yellow; antennal grooves with a golden- yellow bottom; between them the facial triangle brown. Antennae reddish at base; third joint brown; arista white, yellowish as base. Occiput golden-yellowish sericeous below, with a golden-yellow down; black above. Thorax with three golden-yellow, sericeous stripes; the intermediate one is a little expanded before the scutellum; a similar stripe crosses the pleurae and invades the mesosternum. Abdomen with a delicate, short, not very dense golden-yellow pubescence; the fourth segment is a little reddish at tip. Front coxae and all the fe- mora yellow; tibiae brownish, tarsi brown. The pattern of the wings is like that of the preceding species, only the brown crossband is less dark; the costal margin (between the crossband and the apex) is yello- wish-brown. — One male, two females. The specimens of this, as well as of the preceding species vary very much in size. Pliilocompus, 0. Sacken, Bull. Soc. Entom. Fr. 10. Aug. 1881. Philocompus differs from Antineura in its venation; the fourth vein is remarkably contorted; the anterior crossvein is beyond the middle of the wing, and hence unusually long; the posterior crossvein very much curved. The structure of the body is so like that of Antineura that the description of the latter need not be repeated. The differences which from the Philippine Islands. 217 I notice, are unimportant: the front, above the antennae, is still more turgid, and forms a conspicuous bump; the interval between the lunule and the eye on each side in a little broader; the face being a little longer, the antennae do not quite reach the peristoma; the abdomen is, comparatively, a little smaller; the fourth segment is of nearly the some length as the second and third. Chaetotaxy exactly the same. — Wings. Costa and first vein beset with very short hairs; third vein, on its proximal half with a few, very small, sparse bristles. Auxiliary vein closely approximate to the first; its ending in the costa is obsolete; the first vein, before the middle of the wing comes in contact with the costa, and runs alongside of it for a long distance, until they gradually coalesce in the apical portion of the wing. The second and third veins diverge very early; the second forms a gentle curve upwards and runs, some distance before its end, close alongside the first vein. The third vein also forms a long flat curve, convexity rig. 4. Philocompus cupidus. upwards, and ends in the apex. The fourth, before its end, is deeply bisinuate; the long, oblique anterior crossvein is inserted in the first sinus. The posterior crossvein forms a strong, almost angular, bend, which sometimes emits a stump of a vein. Fifth vein nearly straight. Second basal and anal cells of moderate size and equal length 5 the latter not drawn out in a point. From what has been said above, the relationship of the genus to Antineura is obvious. Philocomjnis means boaster, braggart. Philoco'inpus cupidus n. sp. g Q. Reddish -yellow; frontal bump black, with violet reflections; facial and frontal orbits sericeous-golden; third antennal joint brown, arista white, yellowish at base. Thorax with the middle of the dorsum black, with metallic violet reflections; this black dorsal color shows on each side a broad interruption at the thoracic suture; it gradually disappears in front of the scutellum; a more or less large greenish-black spot on the pleura. I have a pale-colored specimen in which the black on the thorax in replaced by faint indication of two longitudinal brownish stri- 218 G. R. Osten Sacken: Diptera pes. Abdomen metallic greenish-black, reddish at the base, beset with a fine golden pubescence. Front tarsi, and four last joints of the other tarsi, dark brown. Halteres reddish. Wings tinged with brownish- yellow; two dark brown crossbands cover the anterior and posterior crossveins; both become evanescent posteriorly and merged into a broad, gray, ill defined shadow along the posterior margin. The anterior margin has a border of more intense yellow, which encroaches a little beyond the third vein; about the middle of the wing it is abruptly cut oflF; between the apex and the tip of the second vein there is a brown margin, the proximal end of which comes in contact with the anterior end of the brown crossband that passes over the posterior crossvein. In some specimens this apical brown margin, as well as the crossband connected with it, are much paler than in others; the other crossband, or dark brown elongated spot, upon the anterior crossvein is usually much darker. — Length 11 — 17 mm. Six specimens. — The eyes, revived on wet sand, appeared purplish-greeu, without stripes, Xenaspis. 0. Sacken, Bullet. Soc. Entom. Fr. 10. Aug. 1881. The most striking peculiarities of this genus consist: 1) In the structure of the scutellum, which is merely a transverse swelling, pro- jecting very little; 2) in the shape of the abdomen, the elongated first segment of which is much narrower than the others. The shape of the second basal cell is also very peculiar, but, as I will show below, does not seem to be an altogether constant character. Head a little broader than the thorax, the profile projecting in front of the eyes; lower occipital orbits moderately swollen, the upper part of the occiput flat, falling off" perpendicularly behind the sharp edge of the vertex. Face slightly concave, although very little re- treating (in the profile); viewed in front, it is narrower above than below; antennal foveae divergent, with wellmarked edges; a very narrow orbit between them and the eyes; the triangular interval between the foveae smooth, transversely concave. Oral opening large, nearly circular; clypeus moderately broad; peristomium almost imperceptibly arched in front, but much more behind ; palpi elongated, flattened. Front broad with nearly parallel sides, turgid above the lunula; the latter occupies more than half of the distance from eye to eye. Ocelli not far from the edge of the vertex. Bristles; two pairs of vertical bristles of moderate size; no other bristle on the head, except a small one on the check, near the pe- ristomium, perceptible with some difficulty among a small tuft of short hairs. from the Philip pine Islands. 219 Eyes glabrous, oblong; in life, they are purple, with a green crossband in the middle and another, broader one, below. Antennae: scapus small; third joint linear, reaching to about two-thirds of the face; arista long, with a very short pubescence. Thorax short, very little longer than broad; lateral transverse su- tures deeply marked, connected by a transverse depression. Two post- humeral and two supra-alar bristles; the third of the latter, usually i:iserted near the scutellar bridge, is wanting ; no praescutellar bristles and none on the pleurae. Scutellum in the shape of a transverse swelling, twice and a half broader than long, projecting very little in profile; hence there is no distinct upper nor underside to it; in the middle, there are two long, erect bristles, the distance between them being a little less than one third of the breadth of the scutellum; me- tanotum flat, and, on account of the smallness of the scutellum, very much in view. Abdomen clavate, the first segment being long and narrow, with parallel sides; the following three segments are much broader than the first and do not differ much in length; the first segment of the ovipositor in the female is rather small and narrow; the ovipositor ends in a point, which bears some microscopic hairs. Legs of moderate length and strength; hind femora not incrassate ; front legs short; fore coxae very moveable. Tegulae very small. Wings: Costa and first vein beset with short hairs; the bristles on the third vein exceedingly minute; auxiliary vein closely approximate to the first, but with a distinct ending in the costa; stigmatic costal cell long, its distal end distinctly marked, although very acutangular; second vein straight; the third diverges from it early, is straight as far as the anterior crossvein, and gently arched beyond; the anterior cross- vein in placed a trifle beyond the end of the auxiliary vein; fourth, fifth and sixth veins nearly straight; second basal and anal cells very small, the latter not drawn out in a point. The shape of the second basal cell is very peculiar: the discal cell is distinctly formed by a bifurcation of the fourth vein and is undivided by any crossvein at the base; thus the second basal cell is outside of the discal, crowded in between it and the anal. Among my seven specimens, six have this structure ; in the seventh, however, the second basal cell is sepa- rated from the discal by a crossvein, as usual among the Ortalidae. The difference between these two structures merely depends on the more or less oblique position of the crossvein ; nevertheless, as the rule seems to be in this genus that it is very oblique and coalesces with the further course of the fifth vein, the interpretation of this venation is, at first sight, somewhat puzzling. XXVI. Heft II. 15 220 C JR. Osten Sacken: Diptera The name Xenaspis alludes to the unusual shape of the scu- tellum, I am in doubt about the relationship of this genus. The shape of the scutellum and the smallness of the second basal and anal cells are very peculiar characters. Fig. 5. Xenaspis polistes. Xenaspis polistes n. sp. $5. General coloring hroivnish- yellow, with some brown markings on head and thorax and a longitudhial brown stripe on the abdomen; wings ivith a pale yellowish-brown tinge, 7nore saturate on the anterior side. Length: 12—14 mm. Head reddish-yellow; a more or less well-marked brown stripe in the middle of the face, does not reach the base of the antennae; bottom of antennal furrows brown; an ill-defined subtriangular brown spot on the front, above the yellowish lunule; a brownish shade on each side of the ocelli; antennae reddish-yellow; palpi brown, reddish at tip. Thoracic dorsum clothed with a short and dense golden pubescence; brown markings, in the shape stripes, are more or less distinct in different specimens; scutellum yellow. Abdomen densely clothed with a golden-yellow pubescence, with an irregular black longitudinal stripe in the middle and more or less distinct lateral stripes of the same color. Coxae brownish; femora reddish-yellow, usually with a brown spot on the underside of the distal half: tibiae and tarsi reddish-brown, the former with some irregular dark-brown lines and marks. Halteres reddish. Wings with a pale brownish tinge, more saturate yellowish between the costa and the fourth vein, darker brownish on the distal half, especially along the third vein. — Two males and five females. N a u p cl a. 0, Sacken, Bull. Soc. Entom. Fr. 10. Aug. 1881. Naupoda is a curious little fly, especially distinguished by its broad and short stature, its flattened head and large development of its basal cells; the second basal cell reaches the middle of the wing and thus crowds out the discal cell, which is reduced to the shape of a square (see fig. 6). Jrom the Philip])ine Islands. 221 Head as broad as the thorax; almost disciform, its longitudinal diameter being very short; it hardly projects in front of the eyes; the occiput is excavated above and allows the head to he closely applied to the thorax; vertex with a sharp edge; lower posterior orbit a little swollen; cheeks moderately broad. Face concave under the antennae, the antennal foveae within arc but feebly marked, and the interval between theni not raised; above the peristomium, the face is somewhat swollen, and this portion of the face is separated from that above by a weak, arched furrow, running transversely from cheek to cheek. Oral opening large, nearly circular; palpi broad and flat. Front and vertex broad, even, nearly flat; about as broad as each eye; a little narrowed anteriorly, not swollen above the lunule; the space on each side, between front and lunule, very narrow ; profile not projecting; ocelli near the edge of the vertex. Two pairs of ver- tical bristles; no other cephalic bristles. Eyes, glabrous, oblong, the vertical diameter being l34 — VA of the horizontal one. Revived on wet sand, the eyes appeared green, with eleven transverse purple stri- pes. Antennae appressed to the face, nearly contiguous at the base, scapus small, third joint oblong, its length about double its breadth, reaching about the middle of the face; arista microscopically pubescent. Thorax broader than long; the lateral transverse sutures are very near the humeri, ending on each side in a feeble longitudinal furrow (visible in oblique light only). Two post-humeral bristles; two supra- alar, one near the scutellum, the other above the alar frenum; on the pleurae, I perceive only one mesopleural bristle (this statement about the bristles requires verification). Scutellum comparatively large, almost semicircular, closely applied to the abdomen, so that the me- tanotum is invisible; on the edge, two (or three?) bristles each side; (the second pair is smaller than the first, and the third, if it may be taken for one, almost disappears among the other pubescence). Abdomen short and broad, finely pubescent, but without bristles; consisting apparently only of two segments; the first is transverse and visible on the sides of the scutellum only; the second occupies the re- mainder of the upper side of the abdomen and is nearly as long as it is broad, convex, smooth; under it, the short basal segment of the ovipositor, with its protruding second segment. In the specimen which I take for the male, the second segment seems to be less large, and a third, short segment is distinctly visible under it; (the abdomen of this specimen is somewhat injured). Legs comparatively short; hind femora not incrassate; tibiae not expanded, nor ciliate; no bristles, Tegulae of moderate size. Wings: Costa and first vein distinctly hairy; the third is glabrous. Auxiliary 15* 222 G. B. Osten Sacken: Diptera in close contact, with the first; ist ending rather indistinct. The first vein ends nearly opposite the posterior crossvein; the second soon after it; the bifurcation of second and third takes place about the middle of the length of the wing; anterior crossvein very short; second basal Naupoda platessa. cell unusually broad and long, reaching beyond the middle of the wing; as a consequence, the discal cell is shortened and nearly square; anal cell comparatively long although shorter than the second basal; cut off square at the end; alula large. The wings are not expanded horizon- tally, their distal half being somewhat bent (as in Stegana); the figure, represents the outline of the venation only. The name Nawpoda means inhabitant of an Island. Naupoda has many points in common with GorgopiS Gerst.; (Stett. Ent. Z. 1860, p. 180) only the head of the latter is much broader, the antennae distant at the base etc.; otherwise the structure of the head and of the abdomen , as rendered in Dr. Gerstaecker's excellent description, agree remarkably well with Naupoda. Gor- gopis does not have the enormous second basal cell and small discal cell of Naupoda; but G. bucephala and N platessa have nearly the same coloring (black, with yellowish head and legs); the eyes of the former are described by Doleschall (Zygaenula paradoxa, Derde Bijdr. p. 46) as „green with nearly concentric red rings"; the eyes of the latter are green with purple stripes. Gorgopis, according to Locav's supposition belongs to the Ulidina (Monogr. N. A. Dipt. Ill, p. 65). But the Ulidina, in Loew's system, have the first longitudinal vein glabrous, while Naupoda and probably also Gorgopis have it pubescent; the Ulidina have the anal cell drawn out in a point; (1. c. p. 64), which Naupoda and Gorgopis have not. Moreover, Gorgopis, as Gerstaecker finds, and apparently with good reason, is related to Pterogenia Bigot and the latter, it seems to me, may be better placed among the Platystomina. The fauna of the Ar- chipelago seems to abound in forms, related to these, although generi- cally distinct. Thus Gerstaecker himself acknowledges that his second species of Gorgopis, G. cristiventris, is only provisionally united with the first. Mr, Bigot's Pterogenia dayak appears to be generically distinct from P. alhitarsis. Rondani's three genera {Elachigaster, from the Philippine Islands. 223 Ditomogaster and Hemigaster) seem likewise to bcloug in this vici- nity. Still another form of this group I publish below, {Asyntona nov. gen.) Naupoda platessa n. sp. $9. Front and face reddish, or yellowish-brown ; antennal scapus brow- nish-yellow; third joint brownish; face shining; on the vertex, on each side of the .ocelli, a large, shining square space, with a little pit, or depression below it; the rest of the front opaque. (The color of the eyes, in life, has been described above). Thorax and abdomen black, shining, microscopically pubescent. Tegulae and halteres yellowish. Legs yellow, hind femora brownish at the root. Wings tinged with yellowish; proximal half brownish, which color is especially distinct in the first basal cell, from which it extends and becomes gradually eva- nescent, towards the costa, the discal and the third posterior cell. There are faint, small, grayish clouds at the tip of the auxiliary, first and second veins, and also about the middle of the last section of the third and fourth veins. Length, about 4 mm. — Four specimens, two of which are females; the abdomens of the two others are damaged, still one of them I believe to be a male. Asyntona. 0. Sacken, Bullet. Soc. Entom. Fr. 10. Aug. 1881. I possess of this genus only a good drawing, executed by Doleschall. I publish it in order to utilize it, the more so as it is a very remar- kable, easily recognizable form, closely allied to Naupoda, which I have just described, but abundantly different. rig. 7. Asyntona Doleschalli. 224 C R. Osten Sachen: Dipfera The venation is very like that of Naupoda, only the second basal cell is less broad, and a little longer. The head is broad, almost Achias-like, the interval between the eyes being broader than the horizontal diameter of each eye, taken separately; the occiput is not closely applied to the thorax (as it is in Naupoda). The antennae are distant at their bases; scapus small; the second joint (or base of the third?) as the figure seems to show, bears a stylifornx organ, poin- ted at the end and about as long as the third joint; third joint ellip- tical; arista plumose. Thorax rounded, broader than long; Abdomen comparatively small (the segments are not indicated in the drawing). Asyntona resembles Gorgopis in the breadth of the front and the remote antennae; but differs in the shape of the head and thorax; the shape of the head does not allow it to be closely applied to the thorax; the thorax is more rounded in front; the abdomen compara- tively larger than in Gorgopis; the venation is altogether different, the basal cells being enormously developed here, while they have the usual shape in Gorgopis, The drawing, which is reproduced here, bore no name; I call the genus Asyntona, in allusion to the carriage of the wings, which are not fully expanded, but somewhat bent under, towards the end. Asyntona Dolesclialli n. sp. Metallic blue, legs and antennae (apparently) Hack, tarsi yelloivish. Length 5 — 6 mm. Hab. Amboina (Doleschall). Doleschall's drawing bears the date of January 28 1859; he died Febr. 26 of the same year. Trypetidae. A comparatively small proportion of the Trypetidae from South- Eastern Asia can be referred to the groups, formed for the European or North- American species. A number of new genera have been intro- med for them by different authors; but, except the well-characterized genus Ptilona v. d. Wulp, those genera require a closer definition. Unable, on account of insufficient materials, to draw up such definitions, I have attempted to point out some characters, principally chaetotactic, that may be of use in future. Dacus Icarus n. sp. $. Body brownish -yellow; scutellum lemon-yellow, with four long bristles ; likewise yellow are : the humeri, a pleural stripe between them and the pteropleura, a more or less square spot on the mesopleura, under that stripe, and the lateral meta- pleural callosities. Thoracic dorsum with three dark brown stripes, not froin the Philippine Islands. 225 reaching the scutcllura ; the lateral ones more or less interrupted ou the thoracic sutures; between the lateral stripe and the root of the wing there is faint indication of another short stripe. Metathorax black, with a faint paler spot in the middle; large blackish spots on the hypo- pleura and sternopleura, abov^ the hind and middle coxae. On the abdomen there are four narrow, black crossbands, ending on both sides in the black lateral borders of the segments; the first crossband is in the middle of what, in Loew's terminology, is the first segment (Monogr. N.-Am. Dipt. I, p. 54, line 7 from bottom), but is, in reality, composed of two segments; this first crossband occupies therefore the anterior margin of the second segment; the following three crossbands, likewise occupy the anterior margins of the three following segments. Legs honey -yellow, hind tibiae more brownish. Head brownish -yellow, in- cluding the palpi and antennae; the third joint of the latter is shorter than in the typical Dacus and does not reach the peristoma; arista microscopically pubescent. Wings with a brown picture consisting of a large brown spot on the distal half of the wing, between the second and the fourth veins; a narrow, arcuate crossband crosses the wing in the middle and follows the anterior margin to very near the apex; the Fig. 8. Dacus Icarus. large brown spot and the crossband are connected on the fifth vein; another crossband reaches from the stigma to the sixth vein; it emits two branches, running towards the root of the wing, one in the first basal, the other in the anal cell. The intervals of the brown are hyaline, except that in the apical part of the wing, which is grayish. Length 8 — 9 mm. — A single male. NB. Although this species has the general appearance and the coloring of a Dacus, it difi'ers in some respects from the typical species of the genus. The second basal cell is less broad; the lobe of the anal cell much less long; the second vein less near the anterior margin; the third antennal joint shorter; the arista microscopically, but distinctly, pubescent ; the scutellum less rounded, more triangular and flatter on the surface; its four bristles longer and stronger. There is one praescutellar pair of bristles; the pteropleural bristle is rather large for a Trypetid ; in other respects, the chaetotaxy, as far as I can see, is like that of Trypeta. 226 C R. -Osten Sacken: Diptera Dacus ferrugineus (Wied.) Macquart, D. E. Suppl. IV. 284. One of my specimens ($) agrees exactly with Macquart's description; another, also a Q , has a black spot on the scutellum, but no black marks on the front femora; a third ($) is much smaller, less than ^/s of the size of the other; the median reddish thoracic stripe is wanting, the apical brown spot on the wings is smaller; the design of the ab- domen is the same. A female from the Andaman Isl., in my collection, agrees with this last specimen in the coloring, but is larger. Bactrocera maculipennis Dol. 1. Bijdr. p. 10, Tab. I, f. 1 is exactly like D . ferrugineus , except that, in Doleschalls drawing, the median thoracic stripe is more marked on the posterior portion of the thorax than in front, and is more yellow than ferruginous. About D. conformis Dol. 3 Bijdr. 50, the author says: ,,simillima maculipenni Dol.", but does not state in what the difference consists. There are therefore, either a number of closely resembling species, or this is a wide-spread and variable species, Ptilona hrevicornis v. d. Wulp, Tijdschr. etc. XXIII, 135, Tab. XI, f. 6. 7. (Sumatra). The color of the abdomen in my specimens is somewhat different from Mr. v. d. Wulp's description: the proximal portion of it is altogether yellowish, embracing the first (double) segment, and the anterior margin of the second ; in some specimens ( y and Q. ) the whole second seg- ment is yellowish. The length is given as 9 mm.; my largest specimen is a little more than 7 mm., without the ovipositor. The agreement of the wings is perfect, and the presence of the costal bristle leaves me little doubt about the identification. Rioxa sp. A single female. Mr. Walker published a Rioxcl lanceoltlta in J. Pr. L. Soc I, 35, Tab. II, f. 3. (Malacca, Borneo), about which later (1. c. I, 132) he observes that it is variable in the distribution of the spots on the wings. My specimen looks very much like the above quoted figure, except that the streak on the disc of the wing, and the dot at the end of it, are wanting. Still more like my specimen is the figure of Ptilona sexmaculata v. d. W. (Sumatra Exped. 51, Tab. Ill, f. 11 (Q), only the white dot at the end of the first vein is wanting; the dot at the end of the sixth vein is almost imperceptible. Under such circumstances, I prefer to abstain from describing the species. Note on the Genus Rioxa. As far as I can judge from the single specimen before me, Rioxa may be distinguished from Ptilona as follows: 1. the arista is plumose on one side only; 2. there is a praesutural bristle in the humeral thoracic region, (no such bristle in from the Philippine Islands. 221 Ptilona); 3. six bristles on the scntellum, the intermediate pair being smaller (Ptilona has only four); 4. the tip of the first vein is in the middle or beyond the middle of the distance between, the tips of the auxiliary and second veins (it is before that middle in Ptilona) ; 5. the section of the third vein before the anterior crossvein is microscopically bristly (glabrous in Ptilona). Mr. V. d. Wnlp has noticed the probable relationship between Ptilona and Rioxa (Tijdschv. etc. XXIII, 183, at the bottom), and some of the above-quoted differences (No, 1 and 4) have been indicated by him in the description of his Ptilona SCXmaculata; I infer therefrom, that P. seccmaculata would be better placed in the genus Rioxa. Rioxa, on account of the presence of a praesutural bristle, would seem to be nearer to Trypeta (in the sense of Meigen), than Ptilona. Prof. Rondani (Ann. Mus. Civ. Gen. VII, 436) has described some species of Rioxa from Borneo. There is a small species Trypeta paritii Dol. 1 Bijdr. 10, Tab. I, f. 2. (I have little doubt that it is the same as T. modesta Wied. A. Z. II, 496), ') which, in the design of the wings, resembles a Ptilona. But it has a praesutural bristle, 6 long bristles on the scutellum and the third vein microscopically bristly. From Rioxa it differs in having the arista plumose on both sides, the first longitudinal vein shorter, third antennal joint shorter; the general shape of the body is also diiferent. T. paritii is a true Trypeta, in Meigen's sense, although I would hesitate to place it in any one of the existing subdivisions. Riooea sp. A fragment of a male; the species is different from the preceding. Trypeta metaleuca Wk. J. Pr. Lin. Soc VII, 238. (North Ceram; Comp. 0. S. Enum. 71). Belongs in the Subg. Acidia. Trypeta Eli mi a Wk. List etc. IV. 1033 (Philippine Islands). The description is recognizable; the locality being the same, the iden- tification is certain. Ortolis regularis Dol. 3 Bijdr. 47 (Amboina) is the same species. Trypeta stellata (Syn. Acinia stellata Macq. D. E. Suppl. IV, 293; Manilla). I have seen the type in Mr. Bigot's collection. Macquart's short description does not quite apply, unless ,,bande dorsals brune'' is read, in the plural, and not in the singular, and „base jaunatre" is put, instead of brunatre. T. stellipennis Wk. J. Pr. Lin. Soc. IV, 159 ') The „Borste ungefiedert" in Wiedemann does not agree; but is that statement correct? 228 C. R. Osten Sacken: Diptera (Celebes), of which I have specimens before me is a closely allied, if not the same species; the wings are exactly the same, and the body likewise, as far as the very poor condition of my specimens of stellatCL allows a comparison. Mr. Walker had determined the latter specimens T. ampUssima, which means I suppose T. ampUpennis Wk. J. Pr. L. Soc. IV, 159 (Celebes), a species described on the same page as T. stellipennis, and marked as occuring in the Philippine Islands in Mr. Walker's Synopsis (J. Pr. Lin. Soc. IX, 27). But ampUssima is said to have a „bare arista", while the arista is distinctly plumose in my specimens of T. stellata, as well as in T. stellipennis. But Mr. Walker had also called bare the arista of his Sophira punctifera (which is again nothing else but his own T. stellipennis), and never- theless his own type, which I saw in the Br. Mus., has a distinctly plumose arista. (Compare my Enumer. etc. 71). With Eutreta Lw these species (whether there are one or several I do not decide) have the broad wings, dotted with white, in common; but their scutellum has six, instead of four, bristles and the third vein is bristly. Try pet a (subg, Tephritis)', a single, damaged male. Small species, the design on the wings very like that of the european and north-american species of the group, without being exactly like any of them. Trypeta Cassandra n. sp. $. Venation like Ceratitis; body black shining; humeri and anterior portion of the scutellum pale-yellow; abdominal segments alternately black and gray; ivings banded with brown. Length 6 — 7 mm. Face pale-yellow, hardly excavated in the profile; cheeks brownish under the eyes; front yellow, brownish -ferruginou«s in the middle; an- tennae yellowish-red, reaching down to about half the face; arista plu- mose; occiput very tumid behind the eyes, pale yellow; its upper, fiat portion brownish. Thorax black, shining; humeri, a short band behind them, across the mesopleura, the metapleura, the lateral callus of the metanotum, and the anterior part of the scutellum, pale yellow. Ab- domen: first segment gray, opaque; its anterior margin black; second segment, black, brownish pollinose; the third gray, like the first; the fourth black; the gray portions are clothed with a short whitish pu- bescence. Halteres: stem reddish, knob brownish. Legs (only the front pair is extant) reddish -yellow, with black bristles. Wings hyaline, banded with brown: the basal crossband fills the second costal cell and reaches the posterior margin at the axillary e:3fcision; a second band forms an arch, which begins at the apex, runs along the costa, stopping from the Pliili'ppine Islands. 229 short a little before the end of the first vein and then crosses the wing in a straight line, ending behind the end of the sixth vein; inside of the hyaline space enclosed by this arch, there is an angular figure of a paler brown, in the shape of a greek lambda, the tip of which is Fig. 9. Trypeta Cassandra. connected with the arch, the somewhat curved proximal branch covers the posterior crossvein and ends in the posterior margin, behind the fifth vein; the straight distal branch ends in the second posterior cell, behind the fourth vein. — A single male. NB. There is a distinct costal bristle; the anal cell is drawn out in a short, but well defined, thumblike point, the crossvein separating that cell fi'om third posterior forming a deep, retreating angle. The form of the anal cell, as well as the general shape of the wing and the venation are those of Ceratitis; but the bristles of the third vein are very small, and the fronto- orbital bristles are not expanded into lamels at the tip. For this reason I leave this species in the genus Trypeta, in the wider sense. Trypeta Alkestis n. sp. $. Yellowish-ferruginous; thorax with four dark brown stripes; the outer ones are interrupted at the suture and connected posteriorly, in front of the scutellum, with the corresponding inner stripe; a narrow black or brown longitudinal line in the middle of the mesonotum, between the two pairs of stripes; on each side, above and in front of the root of the wings, there are ves- tiges of short brown lines. Metanotum black on each side with a narrow yellowish-red space in the middle. Abdomen in the middle of each of the segments 1 — 3 with an arcuated black crossband, which reaches the lateral margins on both sides and is attenuated in the middle; the last segment is black, with but little reddish in the middle. Legs yellowish -ferruginous; halteres yellowish. Wings brown, with a design composed of yellow spots : on the anterior margin a square spot between two triangular ones; on the posterior margin a double spot 230 C R. Osten Sacken: Diptera surroxinding, but not covering, the posterior crossvein and an angular, large spot in the discal and third posterior cells; the root of the wing and a segment of the apex are likewise yellow; the only white mark is a circular small spot in the first posterior cell, within the sinus of ^^V Trypeta Alkestis. the third vein ; the apex of the yellow triangle above the anterior cross- vein and a narrow streak across the second basal cell are also white. Third antennal joint slightly excised anteriorly, rounded at the tip, which does not reach the peristoma; arista rather densely plumose. The chaetotaxy is the normal one of Trypeta (as far as it is preserved on the specimen); thoracic bristles rather long; two praescutellar pairs and two scutellar; but between the latter, a very minute third pair; the praesutural bristle is present; I perceive but one lower fronto-orbital ; but the head of the specimen is damaged. Length 8—9 mm. — A single male. NB. I. The course of the first vein in T. Alkestis is peculiar: after joining the costa, it seems to continue alongside of it, thus pro- ducing the appearance of a flattened thickening of the costal vein between the tip of the first vein and the apex. This thickening gives an unusual breadth to the apical half of the wing; it is possible that it characterizes the male sex only. Something similar, although in a lesser degree takes place in T. Manto. NB. II. T. Alkestis, in the distribution of the spots on the wings, the venation, the structure of the antennae etc. has a good deal in common with Themara ampla Walk. J. Pr. Lin. Soc. I, 33, Tab. 1, f. 5, and may belong to the same generic group, whether this group be called Themara or Acanthoneura. It must be borne in mind that the specimen which Mr. Walker describes here as a male, he declares 1. c. p. 124 to be a female, the true male being Achias macuHpennis Westw.; a fly which I believe to be a Trypetid, its Achias-like head notwithstanding (Comp. my Enumer. etc. p. 73). Trypeta Polyxena 0. S. Enumer. 74 probably likewise belongs to the same group; only the third vein is much more straight, perhaps owing to its sex only, as the described specimen was a female. from the Philippine Islands. 231 The costa, the first and third veins in all these species are beset with bristles; only in T. Alkestis these bristles are very small on the costa and the third vein. In Macquart's figure of Acanthoneura their length must be exaggerated (D. E. II, 3, Tab. 30, f. 2). Themara hirtipes Rond. Ann. M. C. Gen. VII, 435 likewise seems to belong to the same group. Tryp eta Manto n. sp. §. Although the only specimen which I have is very much damaged, I will attempt to describe it, on account of its singular venation. Yellowish -ferruginous; third antennal joint somewhat brownish; arista plumose; abdomen brown or black (damaged); halteres with a brown knob; legs uniformly yellowish-ferruginous. Wings brown; two triangular white spots on the costa, between the tips of the auxiliary and first veins; a small round white spot in the first posterior cell, not far from the anterior crossvein; a similar but less round spot at an equal distance from that crossvein, but on the opposite side, in the first basal cell; somewhat larger spots, one each side of the posterior cross- vein and a round one in the third posterior cell. This design has Fig. 11. a great resemblance to that of Themara ampla Wk., J. Pr. Lin. Soc. I, Tab. I, f. 5, but with this important diff'erence: in Trypeta Manto both triangular white spots on the costa lie within the stigmal cell (third costal cell of Loew. Monogr. etc. I, p. XXI Vj; in T. ampla one of them is outside of that cell. The reason lies in the very peculiar venation of T. Manto: the stigmal cell here is unusually large, owing to the course of the first vein, the tip of which is more distal than in the related species; beyond this tip, the costa is stouter, as it is in T. Al- kestis, but for a shorter distance, and not so conspicuously; the second vein is much more deeply arcuated here than in T. Alkestis, the third vein, on the contrary, much less. It may be that the extraordinary shape of the stigmal cell belongs to the male sex only. Length 7 — 8 mm. NB, The scutellum of my specimen of T. Manto has only two bristles, inserted on each side near the base, and far apart from each other. I cannot perceive the scars of the apical pair of bristles. If 232 C R. Osten Sacken: Diptera this is really a character of T. manto it would show an affinity with the european Aciurae, so very like it in the distribution of the spots on the wings. As far as I can see the third vein is nearly bare; the costa and first vein are beset with weak, microscopic hairs; the antennae are plumose, (which is not the case in Aciura). — In the figure which I give, the venation of the posterior portion of the wing is indicated by dots, because the wings are pasted together in my specimen. Enicoptera. The genus Enicoptera Macq. D. E. Suppl. Ill p. 63, Tab. VII, f. 9, is easily recognizable by its singular venation, due to a wavy course of the second vein, near its end, the wave coming in contact with the end of the first vein and forming a kind of noose. The supernumerary row of bristles on the lower part of the front on each side, and the presence of a praesutural bristle, prove that it is a Trypetid, although the termination of the auxiliary vein is like that of the Ortalidae. The number of abdominal segments in the male is four, the first segment consisting of two, soldered together; the suture is visible on the ventral side. The female has five abdominal segments, the fifth being as long as the preceding. The first segment of the ovi- positor is unusually long, as long as the three or four preceding seg- ments taken together (it is comparatively longer in the larger specimens); convex above and below; the second segment is of corresponding length. (Macquart described only the male). The chaetotaxy is very like that of Trypeta: Vertical bristles: outer pair but little shorter than the inner; post- vertical small; ocellar pair exceedingly minute; two fronto-orbital bristles (only one in some specimens?); lower fronto-orbital 3 (sometimes 4?) placed in an oblique row, at equal intervals, between the orbit and the lunule; a genal bristle, under the eye. Humeral bristle, one; posthumeral two, praesutural one; supra -alar three; a praescutellar pair, far apart. Mesopleural, one; sternopleural none, pteropleural one (very small). — Scutellum — four. The difference from the typical Trypetae consists in the absence of a second pair of bristles in the dorso-central region, and of a sterno- pleural bristle; and in the presence of only a single mesopleural. Mr. Walker (J. Pr. Lin. Soc. IV, 155) described four species from Celebes, which he refers to Enicoptera. But his E. pictipennis is identical with his own Sophira distorta (Walker, Trans. Ent. Soc. N. S. IV, 230) and is not a Enicoptera. E. tortuosa Wk. seems to be closely related to E. flava Macq. The two other species, if Enicopterae at all, are different from my JE. proditriiC. from the Philip pine Islands. , 233 Enicoptera proditrix n. sp, $ $. — Is very like E. flava Macq. D. E. Suppl. 3. 63, Tab. 7, f. 9, but diiFers principally in having a black median thoracic stripe, besides the two lateral ones; the abdomen has two longitudinal black stripes; the hind femora are more or less infuscated. Head browuish-yellow; in the male, the third antennal joint is more brown and there is a brown spot in the middle of the face, and another on each side of the frontal lunule; (these characters are wan- ting in my four females specimens). Thorax yellov^^, with three black stripes; the lateral ones interrupted at the suture; humeral callus and an indistinct stripe between it and the root of the wing, brownish; a similar stripe across the pleura, between the humerus and the front coxa, the brown extending to the latter; and another between the root of the wing and the hind coxae; these two stripes on the pleurae are almost evanescent in the female, but very distinct in the male; scu- tellum with a round black spot on the apex; metanotum brown. Ab- domen yellow, with two broad lateral brown stripes, which begin in the middle of the first segment, where they are sometimes connected by a crossband; in the male that crossband fills the whole distal half of the first segment, and the longitudinal stripes are so broad that they reach the lateral margins of the segments; halteres reddish with a brown knob; legs brownish-yellow, hind femora more or less brown; in the male, the front and middle femora also have a dark brown spot on the posterior side before the tip. Wings like Macq. 1. c. Tab. 7, fig. 9 ; only the brown of the costa fully fills the space between it and the third vein. In the male, the large, oblique crossband coalesces with the brown cloud on the posterior crossvein, and then follows the elongation of the anal cell, and thus joins the brown at the base of the wing. In the female the cloud on the posterior crossvein is sepa- rated from the great oblique crossband by a broad hyaline interval, but connected with it at its anterior end by a yellowish prolongation running towards the anterior crossvein. Length $ 11 — 12 mm.; $ 10 — 15 mm. (without the ovi positor). — One male, four females. Diopsidae. I have five species from the Philippine Islands before me, which may be tabulated thus : Alulae distinct; sixth vein distinctly pro- longed beyond the anal cell. Genus Sphyracephala Say 1. cothurnataBigot. Alulae obsolete; sixth vein not prolonged beyond the anal cell. 234 , C. R- Osten Sacken: Dlptera Two pairs of thoracic spines (besides tbe pair on the sciitellum). Genus Teleopsis Eond. Tip of the wings hyaline Head as dark as the thorax; wings with two brown bands, sub- connected in the middle . . 2. helzehuth Bigot. Head red, thorax black; wings with a brown crossband just before the tip; the band in the middle of the wing much paler, subsolete 3. motatrix n. sp. Tip of the wings dark brown; head yellow 4. selectci n. sp. Only one pair of thoracic spines (besides those on the scutellum). Genus Diopsis . . . , 5. suhnotataWe&iw. 1. Sphyracephala cotliurnata. Diopsis cothurnata Bigot, Ann. S. E. Fr. 1874, p. 115 (Celebes). Sphyracephala (?). The front is pubescent, but there are no conspicuous bristles, except one, each side, near the orbit of the eye. In Mr. Bigot's de- scription, the word ,,superne" in the diagnosis and the coi-responding ,,en dessus'' in the french letterpress, must be struck out; there is only a single lateral thoracic spine under the root of each wing. (Com- pare Bigot, Ann. Soc. Ent. Fr. 1881, p. 373.) Note on the Genus Sphyracephala. Z). coi/mrj^ato, as well as the african Diopsis JBeccarii Rond. differ from the majority of the Diopsidae as follows: 1. There is a distinct alula. 2. The sixth vein is distinctly prolonged beyond the anal cell. 3. The peristomium is not excised in the middle, and hence, there are no distinct projections on each side. 4. The head, viewed in front (in the direction of the axis of the body), appears triangular; that is, its sides rise obliquely from the peristomium (and not almost perpendicularly, as in an ordi- nary Diopsis). 5. The abdomen is not pedunculate and clubshaped (as it is in Diopsis), but rather flat, and attenuated at both ends. 6. The male hypopygium is large and protruding; in the female the ovipositor is represented by two small valvules (white in both of the above-named species); thus the sexes are more easily distinguished, than in Diopsis. 7. The prothorax is shorter, more closely applied to the mesothorax, and has not tlie saddleshaped depression, which from the Phiii'pinne Islands. 235 distinguishes Diopsis. The fore femora are incrassated (more so than in any Diopsis I know of). — I have no specimen of the typical N. Amer. Spliyracephala brevi- cornis for comparison, but as Prof. Westwood mentions the large alulae of his Sph. hearseyana (Cabinet of Orient. Entom. Plate XVIII 1848) as a ground for referring it to Say's genus, and as Prof. Loew (Zeitschr. f. d. Ges. Naturw. Vol. 42, 101, 1873) has the distinct pro- longation of the sixth vein among the characters which he assigns to Sphyracephala, 1 have but little doubt that I am right in referring the above-named two species to the same genus. Moreover, S. Beccarii must be exceedingly like S. hearseyana in its coloring, as Prof. Westwood's description is applicable word for word to it, except that the infuscated tips of the hind femora of S. Beccarii are not men- tioned. Assuming therefore the generic identity of those three species, there would be no necessity for the genus Sexecliopsis Rondani (Ann. Mus. Civ. Gen, VII, 442, 1875) introduced for Diopsis Beccarii, but very insufficiently characterized. S. cothurnata differs from the other species in the absence of the usual vertical bristle, each side, between the eye and the ocelli; but this is not a sufficient generic character. Dr. Loew described a new species from the region of the Amur River, S. nigrimana Lw. I assume its identity with the species from Wladivostok (in the same region), which Mr. Portchinski took for Say's species (Horae Soci Ent. Ross. VIII, 287, 1871). Dr. Loew also described a S. succini from the prussian amber. The living species of Sphyracephala, at present known, may be grouped as follows: Wings without spots Asiatic sp hearseyana Westw. African sp Beccarii Rond. Wings spotted The dark crossband in the middle of the wing does not reach the costa. Asiatic sp cothurnata Bigot. The dark crossband etc. reaches the costa. Front tarsi black. North-Asiatic sp. nigrimana Lw. Front tarsi yellowish. North-Ameri- can sp hrevicornis Say. 1. Teleopsis helzehuih Bigot, Ann. Soc. Entom. Fr. 1874, 113 (Borneo). XXVI. Heft II. 16 236 C. R. Osten Sacken: Diptera I refer, with a doubt, to this descriptioa a species which seems to be common in the Philippines, as it is rejiresented by a dozen spe- cimens. They vary in size from 7 — 8 mm. in length and 10 — 11 mm. in breadth from eye to eye, to 4 — 5 mm. in length and 3-4 mm. in breadth. The Teleopsis longiscopium Rond. (= breviscopium Rond.) must be a closely allied, if not the same, species. 3. Teleopsis n/iotatrio! n. sp. Body Hack; head and front femora rufous; legs with sparse, fine hairs; wings with a single distinct hroivn crossband on the distal half. Length: o— 8 mm. breadth of head, from eye to eye 5 — 14 mm. Head rufous sometimes reddish-yellow; ocular peduncles brown; an- tennae brown, reddish on the underside of the third joint; the usual bristle-bearing spines are of moderate size, midway between the eyes and the ocelli in the specimens with short oculiferous stalks, and com- paratively nearer to the ocelli in those with long ones. Thorax with all its spines black or dark brown, shining; scutellar spines large, curved; the pair above the root of the wings are straight, more than half as long as those of the scutellum; the lower pair much smaller. Halteres reddiish. Abdomen brown, reddish at the base. Legs brownish; front femora incrassated, reddish-yellow or yellowish-red, brownish at base; the coxae brown; front tarsi paler brown. The whole body, including the legs, is clothed with very sparse delicate hairs. Wings subhyaline, with a brown crossband before the tip; its distal margin coincides on the costa with the end of the second vein ; it is a little broader in the middle than at the ends, as it is convex on the proximal side; the anterior crossvein is slightly clouded, and there is a veiy faint oblique Fig. 12. Teleopsis motatrix. cloud between it and the posterior margin; another cloud between that margin and the end of the anal cell; a very minute cloud, which re- sembles a crossvein, in the marginal cell ; all these clouds are paler than the apical crossband. — Five specimens, four of which fragments without abdomen ; in the only specimen which has one, it is remarkably slender. 4. Teleopsis selecta n. sp. Head yellow; vertical bristles developed into strong spines, which are yeUotvish-white at the from the Philippine Islands. 237 base; upper thoracic and scutellar spines with yellowish-ivhite rings; body black, abdomen ivith hoary bands and spots; wings dark brown, hyaline at base and with three interrupted hyaline crossbands. Length 5 — 6 mm. ; breadth from eye to eye (of my single specimen) 5 — 6 mm. Head pale yellow, ocular peduncles with a brown line; antennae brown, paler on the underside ; the bristle-bearing frontal spines unu- sually strong, and nearly as long as the distance from their base to the ocelli. Thorax dark brown, with some gray marks on the shoulders and on the suture, each side; brownish-pollinose in the middle, with two indistinct grayish stripes; the spines above the root of the wings unusually long (at least as long as those on the scutellum), curved, brown, with a pale ring in the middle; scutellar spines long, slightly curved, with a pale ring before the tip, which is dark. Abdomen brownish-black, with crossbands of grayish pollen on the first three segments; the two last segments slightly grayish-pollinose; some other gray spots on the sides of the segments. Legs brownish-yellow, varie- gated with brown; front coxae and femora brown, the latter with a yellow ring before the tip; middle and hind femora brownish-yellow, with a brown ring in the middle and the distal third brown; (the extreme base also has a little brown) ; front and middle tibiae yello- wish-brown; hind tibiae brown, with a yellow ring a little beyond the middle; tarsi brownish. Halteres yellowish. Wings dark brown; the base hyaline nearly as far as the tip of the anal cell; the first hyaline Fig. 13. Teleopsis selecta. band is interrupted by the breadth of the discal cell; the second, by the breadth of the first posterior cell; the third band, placed before the apex, just beyond the tip of the second vein, is only slightly inter- rupted on the third vein. — A single specimen. 5. I) i op sis sub not at a Westw. Cabinet of Orient. Entom. Tab. XVIII, f. 2 (Philippines)! Synon. Z>. argentifera Bigot, Ann. Soc. Ent. Fr. 1874, p. 112 (Celebes)! Two specimens. 16* 238 C JR. Osten Sacken: Diptera Sapromyzidae. Sapromyza. There are nine or ten species in the collection, none of which can be referred to the existing descriptions of asiatic Sapromyzae. One of them has the abdomen colored like Minettia signata v. d. Wulp, Sumatra Exp. 52, Tab. Ill, f. 12. only the penultimate abdominal segment has a round brown spot on the imderside, on each side of the brown stripes represented on the figure. Celyphus levis v. d. Wulp, Sumatra Exp. 53. I refer the specimens to this species, on account of their smooth surface, although their abdomen is metallic green, and not black, the antennae nearly brown etc, Sepsidae. Sepsis revocans Walk, J. Pr. Lin. Soc IV. 163 (Celebes). The specimens were so determined by Mr. "Walker, and agree with his unmeaning description. Sepsis sp. Two specimens, determined S. testacea Wk. J. Pr. L. Soc, IV, 163 (Celebes), by Mr. Walker, but certainly different from it. The species is remarkable for its very bristly legs; the male has teeth on the underside of the front femora. Sepsis spec, named basifera by Mr. Walker (J. Pr. L. Soc. Ill, 125; Aru) is most certainly a different species. Ephydridae. Paralimna sp. Agrees with the description of Notiphila chinensis Schiner, Nov. (which, is a Paralimna), except that the knees and the extreme tips of the tibiae are reddish, a character not men- tioned in that description ; the gray design on the first abdominal segment also seems to be a little different. — Two specimens. Dry XO Rob. D. This genus was established by Robineau Desvoidy (Myod. p, 787) for D. lispoidea R. D. (Sumatra), In 1867 Mr, Jaennicke (Neue Exot. Dipt., p. 59 Tab, I, f. 14) published a good description, with excellent figures of the genus Cypliops, which is hardly different from Dryxo, although the species, C. fasciatus (Sumatra), is not the same as D. lispoidea. I possess two species from the Philippine Islands, which enable me to give a fuller description of the genus. I will base this description upon one of the species {D. digna)^ that I possess from the PMlippine Islands. 239 in a sufficient number of tolerably well preserved specimens, and, at the same time, indicate the points in which the other species differs from it. Head, seen in profile, nearly square, as the front is almost ho- rizontal and the face nearly perpendicular; both project considerably in front of the eyes, (see Jaennicke, 1. c. Tab. I, f. 14a). Front very slightly convex, clothed with a microscopic, nearly appressed pu- bescence, but without any bristles; on the vertex two stout, but ra- ther short vertical bristles each side near the upper corner of the eye; the inner pair converging, the outer diverging. Eyes nearly round, glabrous, comparatively small, the face under them being nearly equal in length to the diameter of the eye. Antennae small, distant at their bases, inserted immediately under the frontal fissure and somewhat appressed to the face in a distinct depression; a couple of exceedingly small bristles near the tip of the second joint; third joint semi-elliptical, finely pubescent; arista plumose on the upper side. The facialia (Stenhammar's epistomatis partes laterales) on each side of the face, between the antennae and the cheeks, are perfectly glabrous, the face likewise. Oral opening large, clypeus retracted, proboscis rather stout, palpi slender, very slightly stouter towards the end. Thorax very gently convex, nearly glabrous; on the thoracic dorsum only four bristles each side; a posthumeral in front of the thoracic suture, in the angle between it and the dorso-pleural suture; and three supra-alar in their normal positions ; on the pleurae, a single mesopleural bristle and a sterno-pleural; the latter about midway be- tween the root of the wing and the middle coxa. Scutellum rather large, flat, projecting horizontally, in the shape of a truncate triangle; four bristles on the edge. Abdomen very gently convex, uniformly clothed with microscopic, semi-appressed hairs (like those on the front); in the male, five apparent segments; segments 6-8, short and narrow, are generally withdrawn. Legs comparatively long; basal joint of front tarsi of the male distinctly incrassated; more slender in the female; on the middle tibiae, besides the ordinary pair of spurs and the other bristles at the tip, there is, on the upper side, a short bristle not far from the base, a second a little beyond it, and a third a little before the tip. The hind femora have (in both sexes) a row of short, erect spines on the distal half of the underside. Pulvilli very small: ungues curved. (The ,,Hinterschienen leicht gebogen" of Jaennicke does not apply to D. digna; the tibiae are straight). Wings rather long; costal vein reaching as far as the fourth vein ; no costal spine; posterior crossvein very oblique, sinuate, approximate to the alar margin; second basal and anal cells obliterate. 240 G- ^- Osten Sacken: Diptera Of D. spreta I have but two, very indifferently preserved spe- cimens. The arrangement of the cephalic and thoracic bristles is the same as in D. digna, only they are weaker; those on the pleurae especially are very small, and require a strong lens. On the upper side of the middle tibiae I perceive but a single bristle, a little distance from the base; but I am not sure whether this in not owing to the imperfect preservation of the specimens. The little spines on the under- side of the hind femora are wanting here; and, from the silence of Mr. Jaennicke about them, I judge that they are also absent in his C. fasciatus. The posterior crossvein is less oblique and not quite so near the hind margin; this seems also to be the case C. fasciatus. Dryxo belongs apparently in the member of those Notophilina, which, like, Paralimna and Corythophora, have the second an- tennal joint not unguiculate, but provided with a very minute bristle; nevertheless, the presence of some bristles on the upper side of the middle tibiae vindicate its position within that group, (in accordance with the arrangement adopted by Loew; see Monogr. N. Am. Dipt. I, p. 131). With both of the above quoted genera Dryxo has the pro- longation of the costal vein as far as the fourth vein in common. But it is abundantly distinguished from Paralimna by the projecting face and front, the great scarcity of cephalic and thoracic bristles etc. Corythophora (Loew, Ofv. K. Vet. Ak. Forh. 1862; S. Africa) I do not know; it may be closely related to Dryxo; it also has a very oblique posterior crossvein; but the words ,,scutellum crassum" and the adjective validae, apphed to the bristles on the middle tibiae, prevent me from assuming the identity. The position of Dryxo among the Notiphilina is, no doubt, so- mewhat artificial. R. Desvoidy placed it near Ochthera; and indeed the bareness of the thoracic dorsum, the arrangement of the cephalic bristles, the venation etc., may indicate a relationship between them. Loew placed Ochthera at first among the Ephydrina (Monogr. N. A. Dipt. 1. c), but removed it afterwards among the Hydrellina (Berl. Ent. Z. 1874, p. 78.) Of the four species at present known, D. Uspoidea R. D.( Su- matra) is seven lines long, and therefore certainly distinct from the others. Cyphops fasciatus Jaenn. (Java) has some points in common with my D. spreta, but is probably distinct, — as will be shown below. I happened to identify this genus TJryxo R. D., merely because I found it among Mr. Walker's determinations, and I believe that this time he was right, although the Paralimnae were likewise called Dryxo by him. Mr. Walker, in his works, frequently refers to Rob. Desvoidy's from the Philippine Islands. 241 genera and shows an unusual acquaintance with them, based, I suppose on some direct communications. Dryxo digna n. sp. $5. General coloring grayish-hlack, hind femora ivith a row of small, erect S2?ines on the %mderside; dorsal abdominal segynents altogether grayish pollinose on the ventral side; wings grayish-hyaline. Length 7—9 mm. Face with a dense grayish-silveiy pollen; antennae brown, second joint silvery-pruinose; front black, somewhat shining in the middle, finely punctate, the microscopic hairs issuing from the punctures; its anterior edge and a narrow line in the middle, not quite reaching the ocelli, yellowish-pruinose; on each side of the vertex, between the eyes and the ocelli, there is a short, oblique streak of the same pollen; occiput blackish-gray. On the thoracic dorsum, a longitudinal geminate gray stripe in the middle and two much less distinct, similar lateral stripes ; anteriorly, they coalesce with the grayish-pollinose anterior margin and humeri; posteriorly, the lateral stripes stop some distance before the scutellum; the intermediate one meets a distinct enlarge- ment of the middle of a gray band running along the scutellar suture; pleurae and pectus grayish-pollinose, with an ill-defined, but distinct brown shade in the middle of the mesopleura. Scutellum grayish- pollinose on the edges, and with a gray line in the middle. The ab- domen may be described as altogether grayish-pollinose with the follo- wing blackish-brown spots; on the second segment, an oval spot on each side; on segments 3 and 4 a broad transverse band at the base, occupying more than half of the length of the segment, its posterior margin bisinuate; from its narrower part in the middle, issues a triangle, the apex of which touches the hind margin of the segment; .on segment five, the same blackish-brown design, only narrower. The ventral side of the dorsal segments in altogether grayish-pollinose. Legs black, densely grayish-pollinose; tarsi blackish; in some specimens the middle tarsi are slightly reddish at base; hind femora, on the distal half of the underside, with' a row of short, erect spines. Wings grayish-hyaline; veins black, brownish-yellow near the root; posterior crossvein very oblique, bisinuate. Halteres reddish-yellow. — Five males; one female. NB. I have described the gray design on the head and the tho- rax from the best preserved specimen; in ordinary specimens it is often very much rubbed off. The figure of C. fasciatus Jsienu. (1. c. Tab. I, f. 14) very nearly represents that design; except that on the thorax there is a middle stripe which is not represented, and that the second abdominal segment is difi'erently marked. 242 C. R. Osten Sacken: Diptera Dry SCO spreta n. sp. General colorinrj dark-brown; under- side of hind femora without spines; all the tarsi reddish ad the base; the dorsal abdominal segments 2—4 have, on the ventral side, eacli a large brown spot in the middle of the gray pollen; ivings ivith a slight brownish tinge. Length 8 mm. Although I have only two badly preserved specimens, the diffe- rences from D. digna are so well marked, that I do not hesitate to describe this species. The pollen on the. face is darker, more yello- wish than in D. digna; a kind of dingy yellowish gray, nearly brown between the antennae, and with a brownish shadow a little lower. Antennae dark brown. Front as in D. digna. Thorax with a grayish stripe in the middle (which is not geminate); on each side an almost circular humeral spot of the same color, each with a brown centre; a faint gray line issuing from each of these circles runs backwards to- wards the corners of the scutellum; the latter as in D. digna. Abdomen: Segments 1 and 2 with a grayish pollen; the latter with a brown spot on each side; segments 3 — 5 each with narrow grayish crossband, interrupted in the middle; the crossbands on segments 3 and 4 are very near the hind margin, but not upon it; on the ventral side, the gray of the second segment and the gray crossbands of segments 3 and 4 expand so as to occupy the whole breadth of the segment, except a large brown spot on each segment in the middle. This series of three brown spots on each side, does not exist in D. digna, where the dorsal segments are altogether grayish pollinose on the ventral side. Femora black, grayish pollinose; tibiae brown, more or less reddish at base; tarsi brown, first joint reddish. Wings subhyaline, with a slight brownish tinge; posterior crossvein oblique, but less so than in D. digna and therefore much less parallel to the alar margin; only slightly bisinuate. Halteres brownish-red. — Two specimens. (Perhaps females, as the first joints of the front tarsi are not incrassated?) NB. These specimens must have been subjected to moisture, and for this reason the face, the stripes on the thorax etc. are perhaps darker than they should have been. — D. spreta is, in many respects, nearer to C. fusciatus Jaennicke, than D. digna: still the total absence of an intermediate thoracic stripe (in the figure; but the description says: three stripes?); the difference in the shape of the abdominal crossbands; the ,,Adern sclnvach gesiiumt", tend to prove that it is a different species. from the Philippine Islands. 243 Geomyzidae. Diplocentra. Loew, Centur. II, 288; Ciirtonotma Macq. D. E. II, 3, 193; Schiner, Faima Austr. II, 22. The species before me agrees in the principal characters with Macquart's description ; but the third antennal joint is rather short, elhptieal (and not four times as long as the second); the scutellnm has only four (and not six) long and strong bristles'); there are several praescutellar macrochaetae, (while Macqaart's species' is said to have no macrochetae on the thoracic dorsum). The chaetotaxy, as far as I can discern in my only specimen is as follows : Head. Vertical bristles, inner pair longer and stronger than the outer; postvertical pair comparatively long; ocellar of moderate length; fronto-orbital, two, the upper one long, the lower one shorter and weaker; a small genal bristle; a weak vibrissa; the upper occipital orbit with a row of shorter bristles (cilia). Thorax. Humeral bristle, one, very long; posthumeral, two; praesutural, one. Supra-alar, three (?) Praescutellar two pairs, the outer one much longer than the inner; a shorter pair, more in front, corres- ponds in width to the outer pair. No other macrochaetae in the dorsal region, but it is closely covered with short, semi-appressed bristles. Pleurae. Mesopleural bristles two, near the mesopleural suture; a third, weaker one between them; a fourth, lower down, above the sterno-pleural suture. Sterno-pleural one, longer than the mesopleural bristles, inserted above the middle coxae. Legs. Two small bristles on each of the front and middle coxae; and one (?) on the hind coxae. Four bristles on the hind side of the front femora; two long apical bristles on the middle femora (also men- tioned in Macquart), and several smaller bristles on the front side; one praeapical bristle on the front side of the hind femora. Front and hind tibiae with one praeapical bristle; middle tibiae with four or five long apical and praeapical bristles. ') The statement that there are six scutellar bristles, and no macrochaetae on the thoracic dorsum, was a mistake of Macquart's^ and not a peculiarity of C. gihhimi. Rondani, Esame etc. p. 18, has corrected it. But Rondani is wrong immediately afterwards, in iden- tifying the Helomyza circumfusa Wied. (Sumatra), with a brazilian species. 244 C. R. Osten SacJcen: Diptera The wings, like those of JBelomyza, have a series of stronger bristles along the anterior margin; nevertheless Loew places the genus among the Geomyzidae (Centuriae, List of species, Vol. I, p. 266) on account of the shortness of the first vein, the end of which coincides with the end of the auxiliary vein. The discal and second basal cells are coalescent (this character is mentioned by Schiner, Fauna Austr. Dipt. II, VII, foot-note, but not by Macquart and Loew; on the con- trary, Macquart's figure shows the second basal cell as closed). The species of the genus hitherto known, are Curtonotum Perrisi Schin. (syn. Helomyza gibba Ferris), from the South of Europe; Helom. gibba F. (Wied.). from S. America; Diploc. helva Lw,, Centiir. II, 91, from N. Amer, and an undescribed South African species, men- tioned by Loew in Centur. II, p. 288. The species from the Phi- lippine Islands which I describe, is not unlike the european and North American species in its coloring. Diplo centra arenata n. sp. Brownish-yellotv, abdomen rvith three rows of stih coalescent hroiun spots along the middle; wings pale brownish. Length 7 — 8 mm. Face yellowish-white; front reddish brown, with two short longi- tudinal paler stripes on which the fronto-orbital bristles are inserted ; anterior margin of the front along ih.Q frontal fissure, yellow. Antennae reddish; third joint brownish. Thoracic dorsum densely punctate with brown, a black hair issuing from each dot; the intervals of the dots pollinose (with a dirty gray anteriorly, more brownish posteriorly). Pleurae yellowish-pollinose; ill- defined grayish-brown spots on the sternopleura and the hypopleura; macrochaetae black. Halteres reddish-yellow. Abdomen yellowish, densely covered with short black hair; longer hairs along the posterior margins of the segments; a brown spot in the anterior lateral margin of each segment (on the ventral side); along the back three rows of subcoalescent brown spots: on segment one, they are coalescent and form a transverse brown spot in the middle of the segment, the an- terior margin of which remains yellow; on segments 2 and 3 the three spots, in the shape of longitudinal brown stripes are connected by a transverse brown band near the posterior margin ; on segment 4 nearly the same pattern, except that the lateral stripes are reduced to a mere brown spot, near the anterior margin and disconnected from the brown baud on the posterior. Wings uniformly tinged with brownish; posterior crossvein very little oblique, slightly sinuate, clouded with brown, A single specimen (female?). from the Philippine Islands. 245 Drosopliilidae. Drosophila ananassae Dolesch. 3 Bijdr. 56 The de- scription is unmeaning, and even a colored drawing which I possess does not aflPord any certainty aboiit the identification. — A single specimen. Drosophila hypocausta n. sp. $ Q. Thorax brownish- red above; pleurae and abdomen nearly black; legs brotvnish- yellow, but femora and front coxae brown; \vings yellowish- subhyal'ine. Length 2V2— 3 mm. Head brownish-red, including the antennae; cephalic bristles and the arista black; thorax brownish-red above; pleurae and sternum dark-brown; abdomen dark-brown, almost black, in one of the spe- cimens slightly reddish at the base; halteres yellowish-red; legs pale brownish-yellow; front coxae and all the femora, except the knees, brown; a weak praeapical bristle on the hind tibiae; wings yellowish, subhyaline; the costal vein reaches the fourth vein; the last section of the fourth vein only a trifle longer than the preceding; it is parallel to the third vein; the second and third veins are diverging; the interval between their tips is about once and a quarter longer than the interval between the tips of the third and fourth veins; the posterior crossvein is a little longer than the last section of the fifth vein; first vein very short, its tip a little nearer to the root of the wing than the anterior crossvein. — Five specimens. Osciitidae. Oscinis dimorpha n. sp. $Q. — Black, fore part of the front red; tip of the wings infuscated; $. Antennae red; legs reddish-yellow, except the hind femora and tibiae, which are brown. Q. Antennae dark brown; legs brown, except the fore coxae, the base of the tibiae and of the tarsi, which are pale yellow. Male. Head black, vertex and posterior part of the front shining black, encroaching in the shape of an angle on the anterior half of the front, which is ferruginous -red. Face and palpi reddish-yellow. Antennae ferruginous-yellow; third joint rounded -oblong, arista micro- scopically pubescent, yellowish at base. Thorax black, slightly grayish- pollinose; scutellum with two pairs of bristles; the intermediate very long. Abdomen black. Halteres reddish-yellow. Wings hyaline, veins yellowish -brown; apex of the wing infuscated beyond the tip of the 246 C- R- Osten Sacken: Dlptera second vein; venation like Walker, Ins. Brit. Dipt. II, Tab. XVII, f. 4 b; but the small crossvein nearer to tbe origin of the third vein; the tip of the fifth vein nearly touches the margin; the posterior cross- vein is much less oblique; a distinct fold replaces the absent basal crossvein and the fifth vein shows a distinct break at the intersection of this fold. Legs i-eddish-yellow; hind femora and tibiae brown, the latter yellow at base and at tip; the anterior femora are slightly in- fuscated on the upper side; fore coxae yellow; the other coxae black, but the trochanters yellowish. Length 2'/^— 3 mm. Female. Like the male, but the antennae and the palpi are brown ; legs brown, except the fore coxae, the trochanters, the base of i\ie tibiae and the tarsi, which are reddish- yellow; tip of the tarsi in- fuscated. The infuscation of the tip of the wing is a little less intense; the marginal cell is often slightly tinged with brownish. Length 3 — 3V2 mm. Phoridae. Phora, a small, pale-colored species. Pupipara. Myophthiria capsoides Rondani, Ann. Mus. Civ. Geuova. XII, p. 154. Prof. Roudani's description was drawn from the specimens of Dr. Semper s Collection. Ornithomyia hatchiana Rondani, Ann. Mus. Civ. Genova, XII, p. 158. (Grafton Australia and Philippine Islands). The spe- cimens were named by Prof. Rondani. from the PhiUpjnne Islands. 247 Table of Contents. pag. Preface 83 List of the species previously described from the Philippine Islauds 86 Tipulidae. Dicranomyia saltans Del 88 Libnotes Semperi n. sp 88 ,, fermitina n sp 89 ,, familiaris n. sp , . 89 Mongoma tenera n. sp 89 Note on the genus Mongoma 89 Eriocera perennis n. sp 91 ., mansueta n. sp 92 Tipula pedata Wied 92 Pachyrrhina laconica n. sp 92 „ ortiva n. sp , 93 Ctenophora suspirans n. sp 94 ,, idalia n. sp 94 ,, dolens n. sp 94 Scamhoneiira nov. gen 95 ., ,, dotata n. sp 95 Bibionidae 96 Mycetophilidae 96 Cecidomyidae 96 Culicidae 96 Tabanidae 97 Haematopota lunulata Macq. et sp. indet 97 Chrysops signifer Wk 97 ,, dispar P 97 Tabanus v. d. Wulpi (Syn. pictipennis v. d. W.) . . 99 ,, Ixion n. sp 99 248 Table of Contents. pag. Stratiomy id ae 99 Rosapha bicolor Bigot 99 Negritomyia maculipennis Macq 99 Acanthina azurea Gerst. (?) 99 Sargus sp. indet 99 Plecticus sp. indet - . . 100 Ptilocera amethystina v. Vol! 100 Musama pauper Wk 100 Leptidae. Atherix limbata n. sp 100 Chrysopila correcta ii. sp 101 ,, ferruginosa Wied 102 „ sp. indet 102 A s i 1 i d a e. Leptogaster princeps n. sp 102 ,, sp. indet 102 Note on the genus Damalis and Synopsis of the species . . . 102 Damalis immerita n. sp 105 ,, vitripennis n. sp 106 uigella V. d. W 106 ,, spec, indet 106 Note on the genus Damalina Dol 106 Damalina Semperi n. sp 107 „ cyanella n. sp 108 Stichopogon peregrinus n. sp 108 Laphria dimidiata Macq 109 „ partita Wk 109 „ Phalaris n. sp 109 „ pseudolus n. sp 110 ,, scapularis Wied (?) - ... 110 „ spec, indeterm. (5) 110 Maira sp 110 Ommatius fulvidus W Ill „ spec, indet. (6) Ill Emphysomera aliena n. sp Ill Promachus manillensis Macq Ill „ foi'cipatus Schin Ill sp. indet. (3—4) Ill Philodicus longipes Sch 112 Itamus sp. indet 112 Asilidae indeterm. (12?) 112 Table of Contents. 249 pag. Bombylidac. Argyramoeba distigma Wied li-^ ,, sp, indet 112 Exoprosopa Oenomaus Rond 112 ,, flaviventris Dol 112 ,, sp. indet 112 Therevidae H^ Thereva lateralis Esch 113 ,, sp. indet H^ Erapidae H^ Elaphropeza exul n. sp. , 113 Hybos sp. indet 113 Dolichopodidae. Psilopus vittatus Wied 113 ,, longicornis Dolesch 114 ,, sp. indet H'* Diaphorus aeneus Dol l'^: maurus n. sp. 114 Syrphidae H"^ Syrphus striatus v. d. W 11*5 sp. indet. (2) 115 ,, aegrotus F H" Sphaerophoria sp. ind 116 Baccha pedieellata Dol 116 sp. indet. (2) 116 Ascia sp. indet H" Eristalis errans F 116 sp. indet. (3) 116 Helophilus sp. indet .116 „ celeber n. sp 116 Note on the genus Graptomyza and synoptic table 117 Graptomyza literata n. sp 1 19 ,, microdon n. sp 119 „ spec, indet 120 Note on the genus Milesia and synoptic table 187 Milesia Semperi n. sp 189 „ Bigoti n. sp 190 ,, Ritsemae n. sp 191 ,, conspicienda Wk. (?) 191 Pipuuculidae 192 250 Tahle of Contents. pag. Muscidae calyptratae 192 Musca conducens Wk 192 Idia muscina Eond 192 „ lateralis v. d. W. (?) 192 Ochromyia ferruginea Dol 192 Lucilia dux Esch 192 „ ditissima Wk 192 ,, fortunata Wk. (Syn. nosocomiorum Do).?) 193 Rhynchomyia indica Eond 193 Sarcophaga brevis Wk 193 ,, sericeonitens Wk 193 Muscidae acalyptratae 193 Sepedon javensis R. Desv 193 Chyliza selecta n. sp 193 Note on the Micropezidae (chaetotaxy; description of some little known genera; synopsis of the genera) 194 Note on the genus Calobata and synoptic table 200 Calobata chrysopleura n. sp 201 ,, galbula n. sp 202 ,, nionedula n. sp 203 „ nigripes v. d. W 203 ,, territa n. sp 208 Euryhata nov. gen. (Micropezidae) .... 204 „ ,, hexapla n. sp 20G „ „ semilauta n. sp 207 Telostylus maceus u. sp 208 Nerius duplicatus Wied 208 ,, fuscus • 208 Scholastes cinctus Gu6r 208 Lamprogaster spec 209 Notopsila nov. gen. (Syn. Pacliycephala Dol.) Ortalidae 209 „ sexpunctata n. sp 210 ,, curta n. sp 210 Adrama determinata Wk. (?) 210 Rivellia fusca Thorns ' 211 Note on the genus Stenopterina and synoptic table 211 Stenopterina calcarata Macq 212 chalybea Dol 213 aenea Wied.? 213 Table of Contents. 251 pag. Antineura nov. gen. (Ortalidae) 213 stolata nov. sp 215 ,, sericata nov. sp 216 Philocompus nov. gen. (Ortalidae) .... 216 ,, cupidus nov. sp 217 Xenaspis nov. gen. (Ortalidae) 218 ,, polistes nov. sp 220 Naupoda nov. gen. (Ortalidae) 220 ,, platessa n. sp 223 Asyntona n. gen. (Ortalidae) 223 „ Doleschalli n. sp. (Amboina) . . . .^24 Dacus Icarus n. sp 224 ,, ferrugiueus Wied 226 Ptilona brevicornis v. d. W 226 Rioxa lanceolata Wk. (?) 226 ,, sp. indet 226 Note on the genus Rioxa ^^6 Trypeta melaleuca Wk 227 „ Elimia Wk 227 „ stellata Macq 227 Tephritis sp. indet 228 Trypeta Cassandra n. sp 228 „ Alkestis n. sp 229 „ Manto n. sp 231 Note on the genus Enicoptera (Enicoptera Macq.) 232 Enicoptera proditrix n. sp 233 Note on Diopsis and Sphyracephala, with synoptic table ... 233 Sphyracephala cothurntlta Bigot 234 Teleopsis Belzebuth Bigot 235 ,, motatnx n. sp '^^^ „ selecta n. sp 236 Diopsis subnotata Westw 237 Sapromyza sp. indet (9—10) 238 Celyphus levis v. d. W 238 9^8 Sepsis revocans Wk „ sp. indet (2) 238 238 Paralimna sp Note. on the genus Dryxo R. Desv, (Cyphops Jaenn.) .... 238 Dryxo digna n. sp „ spreta n. sp 17 XXVI. Heft. 11. 252 Table of Contents. pag. Note on the genus Diplocentra Loew. (Curtonotum Macq.) . . 243 Diplocentra arenata n. sp 244 Drosopliila ananassae Dol. (?) 24o „ hypocausta n. sp 245 Oscinis dimorpha u. sp '-'*•' Phora sp. indet 246 Pupipara Myiophthiria capsoides Rond 246 Ornithomyia Batchiana Rond 246 Addendum et Erratum. On pag. 86, to the List of species etc. add Asilus albispina Thomson, Eug. Resa, 470. On pag. 105, line 20 from top, read saigonensis Bigot, for siagonensis. QL 535.5 P6 O 85 Ent. Osten-Sacken, Carl Robert, freiherr von der, 1828-1906. Diptera from the Phil- ippine Islands. 535.5 P6085 Ent. SMITHSONIAN INSTITUTION LIBRARIES 3 =lDfifi DD3S73E7 t . V nhent QL535.5.P6085 v | Diptera from the Philippine Islands / ^ ^ •' •■ It -»>•/«, • .» (* «« HIS f* SI 'V .«.■ V *<^ • •i' «o vHi tuv •<(*• ■" -t ^, >0 ti* •«* vw )$;( 1> •>> ^ *^ ^ ■*-* ^ '*- ^ ,o;» (ft '«* i*^ m i» *SSl '*■»'*' ** . .- ij, /* « *ei .«.. 0t. .>« ■\,. -i."