BIBIO. 171 



Sides and scutelkim siiuilai- ; metauotuin sometimes very dark 

 brown, normally black. Abdomen black, with dark blackish brown 

 hair. 'Male genitalia black, shining, pubescent ; tips of claspers 

 with several reddish yellow curved horny claws. The female 

 abdomen has a little inconspicuous dark grey hair here and there 

 at the sides. Ler/s wholly shining black, with dark brown hair, 

 which is shorter and blacker on the tarsi, of which the bases and 

 tips of the joints are often very narrowly reddish brown ; spines 

 of fore tibi« tipped with dull carmine. Winr/s brownish grey, 

 anterior part much darker, costal cell nearly black, stigma 

 elongate-oval, black. The wing in the female barely darker than 

 in the male. Halteres black, teguL-e with blackish grey hair. 



LengtJi, d ll-l-^ 2 li^-15 milHm. 



Eedescribed from a long series of males and several females taken 

 by me at Darjiling, 16.x. 05; also from specimens of both 

 sexes in the Indian Museum from the following localities : — 

 Kurseong, 27-28. iv. 10 (ffAbren) ; Matiana, Simla district, 

 28-30. iv. 07 (Annandale) ; Naini Tal, 26. ix. 07 ; Chitlong, Nepal, 

 and a male from Mt. Tahe-pum, 4000-5000 ft., on the N.E. 

 Burmese Frontier, xi. 10 (C. W. Beebe). 



Type S and $ in the Amsterdam Museum. 



The species was abundant at Darjiling during a few days round 

 the 16th October 1905, when I captured several pairs in copula. 

 My identification of the species has been confirmed by _de 

 Meijere's examination of some of the specimens. Its chief 

 distinction from B. marci, L., to which it bears a remarkably 

 close resemblance, is the brown Avings in the male, as in B. marci 

 they are nearly clear, with a whitish tinge. The basal section of 

 the 3rd vein in both species varies distinctly in its relative length 

 to that of the anterior cross-vein, in some specimens being one- 

 and-a-quarter times as long, in others as much as nearly double, 

 and it cannot be relied on as a specific character. 



125. Bibio proximus, Brun. 



Bibio proximus, Brunetti, Eec. Ind. Miis. iv, p. 275 (1911). 



(S. Head wholly black, clothed with black hairs, including 

 dense pubescence on the eyes. Thorax wholly black, dull, 

 dorsum rather more shining anteriorly, pubescence black. 

 Abdomen black, with black pubescence. Legs black ; hind 

 femora barely incrassated posteriorly, distinctly less so than in 

 B. marci ; hind tibiae more incrassated towards tips than in that 

 species, giving a distinctly clubbed appearance ; hind metatarsus 

 distinctly incrassated, the'second joint of the tarsi two-thirds as 

 long as the metatarsus. (In B. marci, the metatarsus is not at 

 all incrassated, and is twice the length of the next joint.) Spines 

 on fore tibise tipped with carmine. Wings very pale grey, only 

 the anterior veins dark, those on hind part of wing normally 

 pale ; first section of 3rd vein barely as long as anterior cross-vein 



