LIST OF DIPTERA. 429 



the eyes with black bristles, furnished on the crown with a few black 

 hairs ; front and clypeus covered with yellow down, the latter armed 

 with mingled black and yellow bristles : eyes black ; fore part nearly 

 flat, with facets a little larger than those of the other part : lip and 

 palpi black, the latter clothed with black hairs : feelers black; first 

 and second joints beset with black hairs ; second joint club-shaped, 

 mi£h shorter than the first; third joint spindle-shaped, a little 

 longer than the first and the second ; fourth and following joints 

 like a bristle, which is a little longer than the third : chest beset 

 with a few black hairs and bristles ; its disk black, with three brown 

 stripes ; side stripes joined by two oblique bands to the sides of the 

 chest, which are hoary, with a yellow tinge : breast gray, with a fer- 

 ruginous tinge, especially on the fore part, clothed here and there 

 with white hairs : abdomen gray, clothed with short white hairs, 

 very slender, and much lengthened towards the tip, nearly thrice the 

 length of the chest ; a large black nearly triangular spot on each 

 segment, the gray of whose sides widens as it approaches the hind 

 border, which is also gray ; first and second segments short ; third 

 and following segments long, successively but slightly increasing 

 in length to the ninth, which is black and shining; tip beset with 

 short black spines : legs black, clothed with short white hairs, and 

 armed with black spines, which on the thighs are short, and chiefly 

 on the under-side ; claws black ; foot-cushions dull pale ferrugi- 

 nous: wings pale brown, with gray tips ; wing-ribs piceous, veins 

 black ; poisers tawny. Variation in the wing-veins. — An additional 

 little cross-vein at the base of each of the open submarginal areolets. 

 Length of the body 14 lines ; of the wings 17 lines. 



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



Asilus iEdithus, n. s., mas. et fern. Ferrugineus, thoracis disco 

 fusco, abdomine fulvo, maculis triangulis nigris, antennis nigris, 

 pedibus ferrugineis, femoribus subtus nigris, alis sublimpidis. 



Body brown : head ferruginous, narrower than the chest, co- 

 vered with white down, clothed behind and beneath with white 

 hairs, beset behind the eyes with black and white bristles ; sides of 

 the crown furnished with a few black, and those of the front with 

 white hairs; clypeus armed with black and white bristles: eyes 

 black ; fore part slightly convex, with facets rather larger than those 

 elsewhere on the eye: lip and palpi black, the latter beset with 

 black bristles: first and second joints of the feelers black, clothed 

 with short black hairs; second joint a little shorter than the first: 

 chest with five silky white stripes ; middle stripe very slender and 

 short; inner pair widening towards the fore border, where they join 

 the outer pair : chest clothed with very short white hairs, beset on 



