LIST OF DIPTERA. 36 J 



of much larger facets : lip black, ferruginous at the tip : feelers 

 black : chest and breast thinly clothed with white hairs : abdomen 

 red, obconical, as broad as the chest and a little longer, black at the 

 base and on the sutures of the segments, thinly clothed with white 

 hairs on each side ; segments from the first to the sixth successively 

 increasing in length ; seventh and following segments shorter : legs 

 black, clothed with white hairs ; shanks beset with short white 

 spines ; knees, hind shanks and hind feet ferruginous ; claws black ; 

 foot-cushions pale tawny : wings colourless ; rudiments of a vein 

 near the base of the fork which divides the submarginal areolets ; 

 the next areolet beneath closed before the border of the wing ; the 

 two following areolets only half divided from each other, the tip of 

 the vein being wanting ; the succeeding areolet closed by a cross- 

 vein near the hind border ; wing-ribs piceous ; veins black, piceous 

 at the base ; poisers yellow. Length of the body 3 lines ; of the 

 wings 5 lines. 



a. South Africa. Presented by Dr. A. Smith. 



Group XXII. 



Dasypogon Agalla, n. s. Fuscus, capite lato, thoracis lateribus fulvisi 

 pectore cano, abdomine piano subtus pallido, antennis nigris, pe- 

 dibus piceis, alls fusco-cinereis. 



Body deep rich brown : head much broader than the chest, co- 

 vered with hoary down, and clothed behind and beneath with white 

 hairs ; clypeus beset with tawny bristles : eyes cupreous : fore part 

 very slightly convex, composed of very large facets, which are quite 

 distinct from the small facets, especially on the lower part of the 

 front : lip black, short, tawny at the base and clothed with tawny 

 hairs ; palpi black, their tips beset with dark tawny bristles : feelers 

 black, as long as the head ; first and second joints very short, beset 

 with a few black hairs ; third joint spindle-shaped, much more than 

 twice the length of the first and the second joints; fourth joint 

 small, not one-fourth of the length of the third ; fifth joint very 

 small : sides and hind border of the chest and of the scutcheon 

 tawny : breast hoary, shining : abdomen flat, nearly linear, much 

 narrower than the chest, and rather more than twice its length ; 

 under-side pale, shining : legs piceous, clothed with tawny hairs ; 

 hips hoary ; feet dark piceous, beset with black bristles ; claws 

 black; foot-cushions tawny; hind shanks club-shaped; hind feet 

 broad at the base : wings brownish gray, especially at the base and 

 along the fore borders ; wing-ribs and veins piceous ; poisers tawny, 

 with a broad piceous band at the base of the knob. Length of the 

 body 4 lines ; of the wings 8 lines. 



a. Venezuela. From Mr. Dyson's collection. 



