146 ^^6 Philippine Journal of Science 1917 



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. Prselabrum 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, 

 in continuation with that of the scutellum; sutural calli yellow, 

 conspicuously cutting into the deep black sides of dorsum ; hum- 

 eral calli yellow; a yellow stripe just below the notopleural 

 line from humeral calli to the root of the wings. Pleurae deep 

 black, smooth, shining only on the posterior half, with dense 

 and long black hairs and with a narrow yellow horizontal 

 stripe on the lower half of mesopleura parallel with the noto- 

 pleural stripe. Scutellum black, shining along the hind border, 

 with four longitudinal yellow streaks; two longer, curved out- 

 ward at end and situated on middle of the sides; two much 

 shorter and paler, placed at apex. Thoracic and scutellar bristles 

 black, scutellum with the apical pair alone, placed just in the 

 middle of each apical yellow stripe. Squamae whitish, with yellow 

 border; halteres yellowish. First abdominal segment black, 

 concealed below the very large scutellum; second segment black, 

 with a complete reddish yellow stripe along the hind border and 

 raised in the middle to form a very sharp keel, which is black 

 before and reddish yellow behind ; third segment reddish yellow, 

 with narrowly black sides below and with a deep oval fovea in 

 the middle, homologous with those of P. dayak and valida; fourth 

 segment not visible; ovipositor short, depressed, black; venter 

 yellowish on middle, black on sides. 



Abdominal pubescence black on the black parts and golden on 

 the reddish yellow parts. Legs stout, entirely reddish yellow; 

 the coxae, chiefly those of the front pair, broadly black behind; 

 front femora with a brown longitudinal streak outside at base ; all 

 the tibiae infuscated at end ; the first joint of all the tarsi whitish, 

 the others brown ; the pubescence black. 



