BIBIO. 173 



to the anterior cross-vein ; the 4th longitudinal vein forks 

 immediately before the posterior cross-veiu. Halteres blackish. 



Length 7-8 millim. 



Described from a male and female taken in cop. by Mr. A. D. 

 Imms at Badrinath, 10,200 ft., Garhwal district, 27. v. 10 (type*), 

 also from one additional male and three additional females of the 

 same date and locality, and a female taken by Dr. Annandale at 

 Phagu, Simla district, 9,000 ft., 11. v. 09. 



Types in the Indian Museum (also most of the other spe- 

 cimens). 



One of the three females referred to above has the abdomen 

 blackish except towards the side, where the colour is sufficiently 

 distinct to indicate that the specimen belongs to this species. 



Very like B. marci, L., the common Palsearctic and North 

 American species, but in that insect the female abdomen is wholly 

 black, as in the male, so that in spite of the resemblance between 

 the males, the specific difference between the two forms is 

 indisputable. 



127. Bibio approximates, Brun. 



Bibio approximatus, Brunetti, Rec. Ind. Mus. iv, p. 277 (1911). 



$ . Body wholly black, Head much flattened, slightly pubescent. 

 Thorax : dorsum with sparse short black hairs ; a very small 

 brownish yellow spot just below posterior corners of dorsum. 

 Scutellum and metanotum black. Abdomen with very pale 

 yellowish hair?. Ovipositor normal. Legs, with terminal spines 

 on fore tibiae, reddish brown, apical spurs on posterior tibiae 

 brownish yellow ; hind metatarsi not at all thickened, nearly 

 twice as long as the 2nd tarsal joint. Wings pale yellowish grey, 

 hardly darker on anterior part ; veins pale brownish yellow, but 

 clearly denned ; those on hinder part of wing, when viewed from 

 certain directions, appear almost as dark as the anterior veins. 

 Stigma large, well denned, oval, black ; a slight narrow blackish 

 suffusion over base of 5th longitudinal vein ; basal portion of 3rd 

 longitudinal vein almost exactly equal to the length of the anterior 

 cross-vein. Halteres black, but basal half of stem yellowish. 



Length 56 millim. 



Described from one female from Kurseong, November, 1910, 

 taken by Mr. D'Abreu. 



Type in the Indian Museum. 



This species must bear a considerable resemblance at first sight 

 to Bibio venosus, Mg., owing to the rather clear wings, the 

 distinctness of the veins, and the similarity in size. Though the 

 abdomen is given as only a little over 5 millim. in length, it is 

 probably more in living specimens, as the single example examined 

 appears to be shortened by shrinkage ; otherwise the wings are 

 abnormally long, their full expanse being 20 millim. The relative 

 length of the hind metatarsus to the following joint is practically 



