LIST OF DIPTERA. 441 



of black bristles ; crown with black hairs on each side ; clypeus 

 thickly armed with long black bristles : eyes dark bronze ; fore part 

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

 clothed at the tip with short tawny hairs ; palpi black, beset with 

 long black hairs : first and second joints of the feelers black, beset 

 with black bristles ; second joint not half the length of the first : 

 chest brown, clothed with short black hairs, beset on each side and 

 behind with black bristles, adorned with three pale brown stripes, 

 which are narrow and linear ; sides and breast hoary, the former 

 with a tawny tinge : abdomen dark brown, much narrower than the 

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

 to the tip, clothed with hoary hairs, beset on each side with a few 

 tawny bristles ; hind borders of the segments grayish tawny ; first 

 and second segments very short ; second segment arched, adorned 

 with a tuft of hoary hairs on each side ; third and following 

 segments long, successively decreasing in length: legs black, clothed 

 with short pale yellow hairs, armed with black spines ; four front 

 shanks red towards the base ; hind shanks piceous at the base ; foot- 

 cushions piceous: wings tinged with brown, gray at the tips, reach- 

 ing when closed to the tip of the abdomen ; wing-ribs piceous ; veins 

 black; poisers tawny. Length of the body 9 lines; of the wings 13 

 lines. 



Asilus Blasio, n. s., mas. Niger, aureo pubescens, thoracis vittis 

 quatuor nigris, abdomine nigro univittato, antennis nigris, pedi- 

 bus rufis nigro variis, alis subfulvis apice cinereis. 



Body black : head narrower than the chest, covered with 

 pale golden down, clothed behind and beneath with white hairs, be- 

 set behind the eyes with a row of black bristles ; crown grayish 

 black, its sides covered with pale yellow down and clothed with 

 black hairs ; clypeus prominent, armed behind with black bristles, 

 and in front with two longer and stouter black bristles and with 

 white bristles and hairs : lips black ; fore part flat, its facets much 

 larger than those of the other part : lip black, clothed at the tip 

 with short tawny hairs ; palpi black, clothed with long black hairs : 

 feelers black ; first and second joints clothed with black hairs; se- 

 cond joint club-shaped, more than half the length of the first ; third 

 joint spindle-shaped, longer than the first; bristle stout, tapering 

 from the base to the tip, a little shorter than the third joint : chest 

 and breast covered with golden down : chest thinly clothed with 

 black hairs, beset on each side and behind with some black bristles, 

 adorned with four black stripes, of which the middle pair are long 

 and linear, the side pair are short, broad, and interrupted : abdomen 



