340 LIST OF DIPTERA. 



short, oblique and rather indistinct ; the middle one linear, longer 

 and broader, its fore part divided lengthwise by a narrow line : breast 

 and sides of the chest paler, the latter beset with a few long stout 

 black bristles : abdomen piceous, shining, linear, flat, obconical, a 

 little narrower than the chest and more than twice its length, obco- 

 nical and red towards the tip, which is armed with short black 

 spines ; under-side paler, dull ; first segment very short ; second 

 segment short, broader and more convex ; third segment long ; the 

 following segments successively decreasing in length : legs tawny, 

 covered with short black hairs ; hips pale reddish brown, with a few 

 tawny bristles ; thighs covered at the base with shining yellow down ; 

 shanks and feet clothed more thickly than the thighs with black 

 hairs ; shanks ferruginous, beset with a few black spines, which are 

 longer towards the tips ; feet piceous, more thickly armed with 

 short black spines, pale tawny towards the base ; claws black, each 

 with a stout tooth at the base beneath ; foot-cushions pale tawny ; 

 fore shanks armed at the tip beneath with a black stout curved 

 tooth, corresponding to some little black tubercles beneath the base 

 of the feet : wings dark brown, paler on the lower border towards 

 the base and on some of the areolets of the disk ; wing-ribs and 

 veins piceous, the latter black towards the tips. Length of the 

 body 9 — 10 lines ; of the wings 14 — 16 lines. 



a. Cincinnati. Presented by E. Doubleday, Esq. 



Dasypogon Duillius, n. s. Fulvus, thorace fusco trivittato, alboque 

 maculato, abdomine piceo lateribus ferrugineis, antennis fulvis, 

 pedibus ferrugineis, alis fuscis. 



Head tawny, a little broader than the chest, piceous on the 

 crown, where, as well as along the hind rims of the eyes, it is beset 

 with black bristles ; it is clothed beneath with tawny hairs, and 

 thickly covered between the base of the feelers and the clypeus with 

 pale yellow down ; clypeus armed with ten or twelve long white 

 bristles : lip short, black, tawny towards the base, where it has some 

 tawny hairs, and there is a little tuft of short yellow hairs at the 

 tip ; palpi rather long, tawny and clothed with tawny hairs towards 

 the base, ferruginous and clothed with black bristles towards the 

 tip : eyes brassy green ; fore part flat, composed of large facets, 

 which diminish in size as they diverge towards the outer and con- 

 vex part of little unvarying facets, but the division is not near so 

 distinct as in some other species : feelers tawny ; first and second 

 joints beset with black bristles ; second joint much longer than the 

 first ; third joint very long, spindle-shaped, longer than the first and 

 the second joints, but not twice their length, clothed with a few 

 black hairs : fore chest short : chest dark tawny, paler on each side, 



