DUKHAM DIPTEEA. 1 45 



XXIV. 224. 



2 (1). Fore tibiae bristly. Face yellow. 



3 (4). Fore tarsal joints 2-5 scarcely dilated in the male. 



Fore metatarsus not so long as the other joints 

 together. V.4 3 with a dark spot. 



(1233. notatus, Stan.) 



4 (8). Fore tarsal joints 2-5 much dilated in the male, the 



spot on V.4 3 absent or very pale. 



5 (6). Fore metatarsus nearly twice as long as the other 



four joints together. Lamellae with moderately 

 long hairs. ( I2 35- insignis, Stan.) 



6 (5). Fore metatarsus about as long as the other four 



joints together. Lamellae with very long and 

 abundant curved black hairs. 



(1235-A-. ripicola, Lw.) 



225. Pcecilobothrus, Mik. 



1 (2). Wings with a brown dab in the middle, the tip snow- 



white in the male, clear in the female. 



(1236. nobilitatus, L.) 



2 (1). Wings unmarked. 



8 (4). Face yellow. Antennae almost wholly black. 



(1237. due alis, Lw.) 

 4 (3). Face whitish. Antennae almost wholly orange. 



(1238. principalis, Lw.) 



226. Hercostomus, Lw. 



1 (18). Lower post-orbital bristles pale. 



2 (13). Antennae wholly black. 

 8 (10). Femora yellow. 



4 (5). Squamae pale fringed ; large species, 4 mm. 



(124 1. gracilis, Stan.) 



5 (4). Squamae black fringed; small species, 2^-4 mm. 



6 (7). Fore tarsi elongate, third and fourth joints deep black 



and dilated. Wings clear. 3 mm. 



(1240. cretifer, Wlk.) 



7 (6). Fore tarsi simple ; wings browned. 



J 



