170 BIBIONIDtE. 



pubescence on the proboscis, palpi, underside of head, and behind 

 the eyes is yellowish. Tliorax : in male, dorsum, scutellum, and 

 sides shining black, densely covered with blackish brown hair. 

 In the female the dorsum is bright brownish yellow (witli 

 microscopic concolorous pubescence), the colour very sharply 

 delimited : the remainder of the thorax black, moderately shining, 

 with short black hairs. Scutellum and scutellar ridge black ; 

 metanotum black. Abdomen : in male, shining black, wholly 

 covered on all sides with thick blackish brown hair ; the genital 

 organs shining black, obtuse, bilobed. In the female, bright 

 brownish yellow with short concolorous pubescence ; belly similar ; 

 genital organs inconspicuous. Legs shining black, pubescent, 

 spines on fore tibiae with a dull carmine tinge, pulvilli yellowish 

 white. Wim/s brownish in male, as in B. ohscuripennis, Meij. ;. 

 in female very pale grey, conspicuously lighter than in the male, 

 anterior border a little blackish in the male, but wholly deep 

 black in the female. Stigma large, black. Halteres black. 



Length, S 14, ? 11-12 millim. 



Described from a male and female in bad condition in the 

 Indian Museum (labelled simply " Ind."), which were returned by 

 Bigot marked " horhdanus S $ ? " ; also a perfect female obviously 

 of the same species taken at Kurseong, 15. v. 10. 



Types in the Indian Museum. 



This is either a large and well-n::arked variety of B. 7tortulam(s\ 

 L., or distinct. The differences apparent are, the much greater 

 size of the male, Jwrtnlanus being generally about 8 to 11 mm. in 

 length ; the brown, not whitish, wings in the male ; the black 

 hair in the female on the underside of the head and behind the 

 eyes, the hair in this position in JiortuJanus ( $ ) being yellowish. 



124. Bibio ohscuripennis, MeiJ. 



Bihio ohscuripennis, Meijere, Bijd. tot de Dierk. xvii, p. 8G (1004). 



c? $ • Head : in male, wholly covered, including the eyes, 

 with dense brown hairs ; vertex prominent, shining ; antennae 



Fig. 18. — Bibio ohscuripennis. Meij.. wing. 



seen from behind appearing grey-tipped at the joints. In 

 female the Irons much more than one-third the width of the 

 head ; hairs black. Thorax wholly shining black, the extreme 

 anterior corners of the dorsum very narrowly reddish brown ; 

 dorsum and prothorax with dense very dark brown hair. 



