SIMULIUM. 189 



margin. Sides of tliorax Mith conspicuous blue-grey dusting ; 

 scuteiluin blackish, nietanotum black. Abdomen black, apparently 

 with a little brownish yellow pubescence ; 1st segment with 

 blue-grey sheen, the fan-like side hairs brownish yellow. Belly 

 black. Lq/s : fore cox<io pale yellowish, posterior coxa) blackish 

 grey ; fore femora principally brownish yellow, a little blackish 

 towards the tip ; posterior femora blackish, the base shortly 

 yellowish ; fore tibiie and tarsi shining black, the proportions of 

 the joints as in JS. indicum, but the three first tarsal joints are 

 widened, although none of them to such an extent as in that 

 species ; 4th and 5th joints very narrow. Middle tibia3 black, 

 narrowly yellowish at base ; metatarsus yellowish, black at tip, 

 rest of tarsus black, the joints narrowly yellowish at base. Hind 

 tibia considerably widened, black, very narrow at base, where 

 it is a little yellowish ; hind metatarsus much enlarged, basal half 

 yellowish, the rest black ; remainder of tarsus black, base of 2nd 

 joint a little yellowish. Hind metatarsus much longer than the rest 

 of the tarsus and practically as long as the tibia. Both hind tibia 

 and metatarsus with long hairs on the upperside. Wings quite 

 clear, venation normal. Halteres bright yellow, large and thick. 



Length 1^ millim. 



Described from a unique male in the Indian Museum from 

 Kurseong, taken by Mr. Lynch, 10-26. ix. 09. 



This is a very distinct species, recognisable by the bluish grey 

 markings on the thorax and the tinge of the same colour on the 

 first abdominal segment. The widening of the third fore tarsal 

 joint is also a specific distinction, and is noticeable when .specimens 

 of >S'. grisesceiis and S. indicuin are placed side by side. 



138. Simulium metatarsale, Brim, 



SimuUam metatarsalis, Brunetti, Eec. Ind. Mus. iv, p. 284 (1911). 



S . Head very closely applied to the thorax. Eyes contiguous 

 from vertex to antennae, upper facets very large. Proboscis and 

 palpi black. Antennie black, Avith close greyish pubescence. 

 Thorax black ; dorsum with close bright yellow hairs which appear 

 reddish orange when viewed from certain directions. Scutellum 

 black, with yellow hairs. Sides of thorax and metanotum black. 

 Lower part of thorax anteriorly with grey dusting. Abdomen 

 wholly black, with rather sparse black pubescence, no trace of gold 

 hairs. Belly similar. The hairs towards the sides of the 1st 

 segment light brownish. Legs: fore coxa3 yellowish, posterior 

 pairs blackish ; fore femora and tibiae dull yellowish, with golden 

 yellow hair nearly as far as the tip of the latter, which, with the 

 whole tarsus, is black ; the tarsus narrow, of equal width through- 

 out ; in spite of the gold hair the fore tibite viewed from above 

 appear whitish grey. Middle femora and tibioe slender, basal half 

 of each yellowish, with some yellow hair, apical half black, as are 

 the slender middle tarsi. Hind femora mainly black, slightly pale 

 yellowish at base, tibiae much incrassated, basal half yellowish, 



