XII, D, 3 Bezzi: Studies in Philippine Diptera, II 141 



in the middle of wing a single, narrow, curved brown band, 

 which begins at end of the first basal cell in front of the an- 

 terior cross vein, fills out the end of the discoidal cell, sur- 

 rounds the hind cross vein, and ends at apex of the fifth vein; 

 the upper half of this band darker than the lower half. A 

 short pale brownish streak extends from the end of the first 

 longitudinal vein to the middle of the submarginal cell. Ante- 

 rior cross vein on the last third of the discoidal cell and near 

 the hind cross vein, which is oblique and a little longer than the 

 distance between the two transverse veins ; last sections of third 

 and fourth veins straight and almost parallel, the first posterior 

 cell being only a little broadened at end ; the section of the sixth 

 vein after the anal cell longer than the apical cross vein of the 

 anal cell. The entire wing surface strongly pubescent, the third 

 longitudinal vein covered with long scattered hairs on its whole 

 length. Discoidal cell a little longer than the second basal ceil. 

 Luzon, Laguna, Mount Maquiling {Baker). 



Key to the Philippine species of the genus Pterogenia Bigot. 



It seems that this genus, although not yet recorded from these 

 Islands, is represented by a great number of peculiar endemic 

 species ; at least I have found in Professor Baker's collection no 

 less than six species, none of which can be referred to any 

 of the twenty-seven oriental species included in Hendel's 

 monograph. 



a\ Scutellum entirely black. 



b^. Frons as broad as an eye; mesonotum with yellow stripe on each side 

 of dorsum, from suture to scutellum; a very robust species of pro- 

 portionallj'' large size, with only banded, not spotted, wings. 



valida sp. nov. 



6^ Frons narrower than an eye; mesonotum entirely black or only with 



a notopleural yellow stripe; smaller species, with banded and 



spotted wings. 



c\ Occiput entirely black, even below, or only with a narrow yellow 



stripe on upper part; mesonotum without a yellow notopleural 



stripe - tristis sp. nov. 



c'. Occiput with a broad yellow postocular border; mesonotum with 



a yellow notopleural stripe parva sp. nov. 



a', Scutellum margined or striped with yellow, at least on sides. 



d\ Frons broader than an eye; head broader than high; second abdominal 

 segment with a longitudinal keel; legs entirely reddish; wings 

 yellowish, not banded, and with numerous dark spots. 



laticeps sp. nov. 

 d^ Frons narrower than an eye; head higher than broad; second abdom- 

 inal segment without keel; leg's mainly black; wings distinctly 

 banded. 



