PHILIPPINE DIPTERA, II 45 



numerous and with a distinct basal band before the anterior 

 cross vein; fuscous border of the hind cross vein broader; the 

 spots in the hyaline apical part less developed. Anterior cross 

 vein a little beyond middle of the discoidal cell; anal cell much 

 shorter than the second basal cell ; cross vein at end of the second 

 basal cell shorter than the second section of the fifth vein, 

 which makes its lower border. 

 MINDANAO, Butuan (Baker). 



187. Pterogenia laticeps sp. nov. 



A robust species, which in the form of head and in general 

 aspect is very like P. dayak and P. valida, but differs very much 

 in coloration of body, legs, and wings; in the shape of the 

 second abdominal tergite it shows an affinity with the Bornean 

 P. albovittata Rondani. 



Female. Length of body, 7 millimeters ; of wing, 6.5 ; breadth 

 of body, 3. Head broader than high, yellow with black markings. 

 Occiput above with a black transverse band between vertex and 

 neck; frons broader than eye, as long as broad, with two black 

 parallel crossbands, the broader one situated near the vertex 

 and including the ocelli, the other narrower and placed distad 

 of the middle, united to the preceding band by a black middle 

 stripe; the short frontal pubescence black, like the single pair 

 of vertical bristles; lunula shining black, frons opaque. Face 

 broad, entirely dull yellow, a broad black spot, shining in the 

 middle, just below the lunula and forming with it a single 

 rounded spot at the root of antennae; a narrow black semicir- 

 cular line, interrupted in the middle and dilated in a spot on 

 each end, which divides the broad but flat epistome from the 

 jowls. Cheeks yellow and much narrower than in P. dayak; 

 jowls as broad as in P. dayak, as long as one half of the vertical 

 diameter of eye, lighter yellow than the face, and clothed with 

 numerous, short and dense black hairs; on the prominent and 

 dilated lower occipital border are two small dark spots near the 

 eye, above the inferior angle. Antennae yellow and much shorter 

 than the face, the two basal joints with a black spot on interior 

 side; arista shortly plumose, the feathers being about as broad 

 as the third joint. Praelabrum retreating, narrow, yellow, white- 

 dusted; proboscis yellowish brown; palpi broad, yellow, with 

 short and scanty blackish hairs. 



Mesonotum and scutellum dull black, punctulate, with short 

 black pubescence; on each side of the dorsum, from suture to 

 scutellum, a rather narrow shining yellow stripe, curved out- 

 ward at end and accompanied inward by a short yellow streak, 



