42 PHILIPPINE DIPTERA, II 



on each side, which is continued over the broad cheeks, ending 

 with a point at some distance above the mouth border; face 

 concave, black, shining on the antennal grooves, which are 

 separated by a flat yellow keel ; epistoma broad, blackish brown, 

 prominent; jowls very broad, about one half as broad as the 

 vertical diameter of eye, rugulose, black except the terminal 

 points of the yellow stripes of cheeks and of occiput. Lunula 

 black, dark yellowish on the sides. Antennae short, much 

 shorter than the face, entirely black; third joint gradually at- 

 tenuated, but obtuse at end, with a basal, shortly plumose 

 blackish arista, the total breadth of feathers being equal to the 

 breadth of the third joint. Prselabrum very narrow, retracted, 

 blackish; proboscis and palpi black, the latter very broad and 

 provided with short dark hairs; a single pair of vertical ce- 

 phalic bristles, the inner one black; the short and dense frontal 

 pubescence black on the middle stripe and whitish on the yellow 

 borders. 



Mesonotum and scutellum shining black, but the first on dor- 

 sum appears to be less shining on account of the coarse punctula- 

 tion; clothed with short black pubescence and provided with 

 black bristles; scutellum bordered with about fourteen short 

 bristles. A broad, faintly curved yellow stripe on each side of 

 dorsum, extending from the suture to the scutellum; a broader, 

 but shorter, yellow stripe extending from the small black hum- 

 eral calli to the root of the wings. Pleurae and breast entirely 

 black, glistening, with rather long and dense black hairs. Meso- 

 phragma shining black. Squamae broad and long, pellucid gray- 

 ish, with pale yellowish and whitish pilose borders; halteres 

 pale yellowish, proportionally small. 



Abdomen very short and broad, strongly convex in the middle, 

 finely punctulate, with short dark pubescence and rather long 

 black hairs on the sides; it is shining black, with bluish reflec- 

 tions on the sides. Second and third tergites with a narrow, 

 but complete, yellow hind border; the third segment with the 

 peculiar, triangular area of P. dayak, situated at middle of hind 

 border and clothed by a soft, spongy membrane ; fourth segment 

 very narrow, entirely bluish ; ovipositor short and black, its basal 

 segment compressed, not depressed as usual. Venter black. 

 Legs rather stout, entirely black even on the coxae, and with 

 black pubescence; femora only a little dark brownish near the 

 base above; the two basal joints of all the tarsi whitish yellow 

 and whitish pubescent, the last three joints deep black. 



Wings grayish hyaline, distinctly yellowish along the costal 

 cell. An irregular fuscous band extending over the base of the 



