282 Records of the Indian Musatiii. [Vol. IV, 



SIMULIIDAE. 

 SIMULIUM. 



Table of species. 



A Thorax distinctly reddish brown, with 



short yellow hair . . . . mfithorax, sp. nov. 



AA Thorax black ; at most with a dull 

 reddish brown tinge occasionally. 

 B Thorax with grey shoulder spots, and 

 a wide greyish band on posterior 

 margin . . . . . grisescens, sp. nov. 



BB Thorax wdthout either gre}^ shoulder 

 spots or posterior marginal band. 

 C Abdomen destitute of any sign of 



yellow hair. 

 D Hind metatarsus much incrassated, 

 nearly as long and as large as the 

 tibia ^ . . . . . . . . nielaiarsalis, sp. nov. 



DD Hind metatarsus not so conspicuously 

 incrassated ; distinct^ less in size 

 than the tibia. ^ 

 E Antennae wholly black. Long. 2^ mm griseifrons, sp. nov. 

 EE Antennae reddish yellow at base. 



Long. I J mm. . . . , . . rufibasis, sp. nov. 



CC Abdomen with short bright 3'ellow 

 hair, or with rather shaggy brownish 

 yellow hair. 

 F Abdomen with normal, short, very 



bright yellow hair. 

 G Abdomen with at least the first two 

 segments distinctly yellowish or 

 brownish yellow, often several seg- 

 ments so coloured . . . . indicum, Becher. 



GG Abdomen all black . . . . aurcohirtuni , sp. nov. 



FF Abdomen wdth distinctly longer shaggy 



brownish 3^ellow hair . . . . senilis, sp. nov, 



Simulium rufithorax, mihi, sp. nov. 



(f 9 . Bombay ; E. Himalayas. Long. 2 mm. 



Head. — Eyes dull red, the upper facets in the cf very large, 

 the lower ones small, sharply demarcated from each other, the 

 eyes being absolutely contiguous from the extreme vertex to the 

 antennae. In the 2 the facets uniformly small, the frons dark 

 grey, nearly blackish, covered with golden yellow hairs. Proboscis 

 and palpi blackish, the former with w^ell-developed labella at the 



1 Probably a sexual character, but no better one offers itself, and the two 

 forms may possibly be the o" and $ of the same species. 



