192 



SIMULIIDJE. 



head, black, with bright yellow hair ; face whitish grey, with 

 some yellow hairs. Antennae of male wholly brownish yellow : 

 of female black, scape reddish brown, or brownish yellow, but the 

 colour extending to more or less of the flagellum. Proboscis 

 black, tip brownish ; palpi black. Thorax velvet-black, with close, 

 short, bright yellow hair, the shoulders narrowly yellowish brown, 

 occasionally broadly so ; no reddish tinge to dorsum. Sides of 



Fig. 24. Simulium indicum, Becher : a, palpus ; b, front view of head. 



thorax distinctly grey, occasionally with a grey-dusted band along 

 the lateral margins of the dorsum, which 'in such specimens, 

 viewed at a low angle from behind, appears wholly whitish grey. 

 Scutellum black, with yellow hair ; metanotum black. Abdomen 

 black, the basal segments always to a greater or less extent 



Fig. 25. Simulium indicum, Becher : a, fore tarsus ; b, mid tarsus ; 

 c, hind tarsus. 



yellowish, or brownish yellow, the colour often reaching to the 

 middle, occasionally nearly to the tip of the abdomen. The whole 

 dorsum ( bears bright yellow hairs as on the thorax. Belly usually 

 pale to the same extent as the dorsum. The extent of the yellow 

 on the abdomen is very variable, in the series of specimens 

 examined. Legs : fore coxae brownish yellow, posterior coxse 

 black. Femora and tibiae both normally brownish yellow on the 



