46 PHILIPPINE DIPTERA, II 



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. 



Wings with a yellow tinge, which is more intense on the basal 

 half and along the fore border; they have a few dark spots, 

 arranged to form crossbands a basal, less-defined one, a 

 middle one more developed and double, and three others on apical 

 part after the hind cross vein, which is narrowly bordered with 

 fuscous along the inner side only. Veins yellow ; third and 

 fourth a little wavy, the first posterior cell dilated at end; an- 

 terior cross vein on middle of discoidal cell; second basal cell 

 much longer than the anal one, its two apical cross veins being 

 of about the same length ; anal cross vein straight. 



LUZON, Laguna, Los Bafios (Baker). 



188. Pterogenia luteipennis sp. nov. 



A distinct species near P. pectoralis Hendel, from New Guinea, 

 but at once distinguished by the yellow base of the wings. 



