78 LIST OF DIPTERA. 



shank : wings brown, paler along the fore border, with seven yellow 

 spots on each ; the first spot, near the base, forms a band across the 

 wing, and is connected on the fore border with the second, which is 

 the largest ; the third and the fourth are of moderate size ; the fifth 

 is larger; the sixth and the seventh are small, and, as it were, satel- 

 lites of the fifth, one is on the fore border, the other on the hind 

 border of the wing ; the extreme tip of the wing is also yellow, and 

 there are some slight indications of very small yellow spots along the 

 hind border; veins yellow or brown, according to the colour through 

 which they pass ; poisers tawny, with yellow knobs. Length of the 

 body 7 lines ; of the wings 14 lines. 



a. Ceylon. From the Eev. J. Wenham's collection. 



Ctenophora melanura, n. s., fern. Ferruginea, thorace fusco tri- 

 vittato, abdomine apice nigro, pedibus fulvis, tarsis posticis 

 nigriS) alls basi Jlavis, apice fuscis. margine postico cinereo. 



Head wanting: chest dull ferruginous, with three indistinct 

 brown stripes : tip of the scutcheon brown ; breast and sides of the 

 chest pale brown, the latter varied with yellow : abdomen ferrugi- 

 nous ; the three last segments black : legs tawny ; tips of the hind 

 shanks piceous ; hind feet black : wings yellow from the base to 

 beyond the middle, the other part brown, with the exception of the 

 whole of the hind border, which is gray ; veins tawny or brown, ac- 

 cording to the colour through which they pass ; poisers tawny, their 

 knobs darker. Length of the body 8 lines ; of the wings 18 lines. 



a. Nepaul. From the Hardwicke bequest. 



Pterocosmus, n. g. 



Feelers of the female setaceous, 7-jointed, not longer than the 

 chest : mouth hardly produced : palpi 4-jointed : abdomen of the 

 male obclavate, longer than that of the female, which is pointed at 

 the tip : wings with the first, second and third longitudinal veins 

 simple, the last joined to the fourth by a cross vein ; the fourth 

 sending forth two branches from its upper side ; its second branch 

 is connected with its first, and its first with the branch of the fifth 

 vein by two short cross veins ; the fifth or main vein runs near the 

 fore border, and sends forth a branch from its lower side at one- 

 third of the length of the wing ; this branch also sends out from its 

 upper side a branch which is shortly forked, and is connected by a 

 short recurrent vein with the main vein, which, at this junction, 

 emits a short oblique vein to the fore border. 



