450 LIST OF DIPTERA. 



gray on each side, clothed here and there with white hairs : abdo- 

 men narrower than the chest and twice its length, tapering from the 

 base to the tip, thinly clothed with short white hairs, and beset with 

 one or two white bristles on the sides of the hind border of each 

 segment: legs grayish black, clothed with short white hairs and 

 with some short white spines ; claws black ; foot-cushions pale fer- 

 ruginous : wings colourless ; cross-veins slightly clouded with yel- 

 lowish brown ; wing-ribs piceous ; veins black, dark ferruginous at 

 the base ; poisers tawny. Length of the body 7 — 8 lines ; of the 

 wings 10 — 12 lines. 



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



Asilus Paron, n. s., mas. Fuscus, capite pilis albis nigrisque vestito, 

 thorace vittis duabus maculisque nonnullis nigris, abdomine pilis 

 jiavis canisque vestito subtus cano, antennis pedibusque nigris, 

 tibiis rufis, alis subfuscis. 



Body pale brown : head a little narrower than the chest, hoary 

 and clothed with white hairs behind and especially beneath, clothed 

 on the crown with a few black hairs, and beset behind the eyes with 

 some black bristles ; front thickly clothed with long black bristles ; 

 clypeus more thickly covered with longer white bristles : eyes cop- 

 pery ; fore part slightly convex, its facets but little larger than those 

 of the other part, from which it is not easy to be distinguished : lip 

 black, its tip clothed with tawny hairs : feelers black ; first and se- 

 cond joints linear, beset with black hairs ; second joint much shorter 

 than the first : chest rather thickly clothed with black bristles, and 

 having two narrow black stripes close together, and on each side of 

 them some blackish spots ; the bristles on the hind part of the chest 

 are longer and more numerous than those on the fore part, and the 

 scutcheon is armed with three stouter bristles : breast and abdomen 

 a little paler than the chest : abdomen clothed with pale yellow and 

 hoary hairs, much narrower than the chest and rather less than twice 

 its length, hoary beneath ; third, fourth and fifth segments long ; 

 sixth and following segments shorter: legs black, covered with gray 

 bloom and clothed with long pale yellow hairs ; thighs and shanks 

 beset with some black spines; thighs rather thick; shanks red, 

 black beneath and towards the tips ; feet thickly armed with black 

 spines; claws black; foot-cushions tawny: wings very slightly tinged 

 with brown, widened and very convex on the fore border at two- 

 thirds of the length ; wing-ribs and veins piceous, the latter black 

 towards their tips ; poisers tawny. Length of the body 8 lines ; of 

 the wings 12 lines. 



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



