142 The Philippine Journal of Science isii 



e\ Scutellum black, with a narrow yellow hind border; no yellow 

 stripes on dorsum of mesonotum or on sternopleura ; wings dis- 

 tinctly yellow at base luteipennis sp. nov. 



e^ Scutellum yellow, with a black central spot; dorsum and sterno- 

 pleura with yellow stripes; wings without yellow at base. 



centralis sp. nov. 

 184. Pterogenia valida sp. nov. 



A stout, short, and broad species, closely allied to the Bornean 

 P. dayak Bigot, but easily distinguished by the black legs, the 

 shortly plumose arista, and the compressed ovipositor. 



Female. — Length of body, 8 millimeters; of wing, 8; breadth 

 of body, 4.2. Head greatly developed, rather flat, about as high 

 as broad, black with yellow markings. Occiput rather concave 

 above, glistening black on middle, with a dull deep black border 

 and besides with a complete yellow border, which is narrow 

 distad of the vertical keel and near the upper eye border, but 

 broader on the dilated and produced inferior part. Frons as 

 broad as an eye, somewhat shining black on sides at vertex, 

 opaque brown on the middle band, with a broad yellow border 

 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. Antennse 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. Praelabrum 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. 



