LIST OF DIPTERA. 407 



the length of the chest ; hind borders of the segments tawny, and 

 clothed with hoary hairs; under -side hoary; segments from the 

 third to the eighth successively decreasing in length ; ninth segment 

 long, slender, black, shining, forming a short tail. Length of the 

 body 7 — 8 lines ; of the wings 12 lines. 



a. Brazil. 



Asilus Turinus, n. s., mas. et fem. Ferrugineus, thorace piceo qua- 

 drivittato, abdomine fusco, fem. cano apice compresso nigra ni- 

 tente, antennis nigris, pedibus fulvis nigro variis, alis limpidis 

 apice cinereis, 



Male. — Body brown: head much narrower than the chest, co- 

 vered with yellow down, clothed thinly behind and thickly beneath 

 with long pale yellow hairs, beset behind the eyes with a row of stout 

 black bristles ; crown pale brown, beset on each side with black 

 bristles ; clypeus prominent, armed with long yellow bristles, and in 

 front with a few more slender black bristles : eyes dark green ; fore 

 part convex, its facets larger than those of the other part : lip black, 

 clothed at the tip with short pale yellow hairs ; palpi black, clothed 

 with long yellow hairs : feelers black ; first and second joints covered 

 with a brown bloom, beset with short black bristles; second joint 

 much shorter than the first : chest light ferruginous, clothed with 

 very short black hairs, beset on each side and behind with black 

 bristles, adorned with four piceous stripes, the middle pair straight 

 and narrow, the side pair broader, and each of them interrupted by 

 two oblique brown bands ; scutcheon, hind chest, and breast hoary, 

 partly clothed with whitish hairs : abdomen narrower than the chest, 

 and rather more than twice its length, tapering from the base to the 

 tip, thinly clothed with short pale yellow hairs ; hind borders and 

 sides of the segments tawny ; first and second segments very short ; 

 second segment arched, clothed on each side with some long pale 

 yellow hairs, and armed there with three white spines ; third and 

 following segments long, successively decreasing in length to the 

 tip ; third segment dotted with three cross rows of punctures, armed 

 on each side with two white spines about the middle, and with two 

 more on the hind borders ; fourth and fifth segments armed with 

 two white spines on each side of their hind borders ; sixth and fol- 

 lowing segments brown ; each side of the sixth segment armed with 

 one white spine ; under-side gray : legs dark tawny, clothed with 

 short pale yellow hairs, armed with black spines ; thighs and tips of 

 shanks black on the outer side ; under-side of the shanks and of the 

 feet covered with tawny down : feet black, tawny towards the base : 

 foot-cushions pale ferruginous ; a black streak on each shank : 

 wings colourless, gray towards the tips ; wing-ribs piceous ; veins 



