LIST OF DIPTERA. 417 



with black hairs: abdomen dull tawny, clothed on each side towards 

 the base with yellow hairs, tapering from the base to the tip, nar- 

 rower than the chest and full twice its length ; first and second seg- 

 ments short ; third and following segments long, successively, but 

 very slightly decreasing in length ; under-side gray s legs ferrugi- 

 nous, clothed with black hairs and bristles; feet darker; claws 

 black, ferruginous at the base ; foot-cushions brown : wings with a 

 slight tawny tinge ; wing-ribs dark ferruginous ; veins piceous ; 

 poisers piceous. Length of the body 15 lines ; of the wings 25 

 lines. 



a. Brazil. 



Asilus Hagno, n. s., mas. Ferrugineus, thorace nigro quadrivittato, 

 abdominefusco, antennis ferrugineis, pedihis piceis, alisfuscis. 



Head narrower than the chest, covered with pale tawny down, 

 clothed behind and beneath with pale tawny hairs, beset behind the 

 eyes with black bristles ; crown piceous, beset with black hairs 

 on each side ; front covered with long black hairs ; clypeus promi- 

 nent, clothed with long black and long pale yellow hairs : eyes dark 

 bronze ; fore part flat, with large facets ; lip black, clothed at 

 the tip with short tawny hairs ; palpi clothed with long pale yellow 

 hairs : feelers dull ferruginous ; first and second joints of equal 

 length, beset with short black bristles ; third joint spindle-shaped, 

 as long as the first; bristle black, twice the length of the third joint; 

 chest dull ferruginous, thinly clothed with short black hairs, beset 

 on each side and behind with black bristles, adorned with four very 

 broad black stripes, which occupy nearly the whole back ; each of 

 the side stripes interrupted by an oblique band ; scutcheon clothed 

 with a few long pale yellow hairs : abdomen brown, clothed on 

 each side towards the base with tawny hairs, gray beneath, tapering 

 from the base to the tip, which is black and shining, narrower than 

 the chest, and rather less than twice its length ; first and second 

 segments short ; third and following segments long : legs piceous, 

 clothed with black hairs and bristles ; claws black ; foot-cushions 

 piceous : wings brown ; wing-ribs and poisers piceous ; veins black. 

 Length of the body 13 lines ; of the wings 22 lines. 



a. Brazil. 



Asilus Eanes, n. s. Cinereo-ferrugineus, abdomine cinereo, pectore 

 pills fulvis vestito, antennis nigris, articulo 2° ferrugineo,pedibus 

 rufis, alis subfuscis. 



Head a very little narrower than the chest, covered with hoary 

 down, beset behind the eyes with black bristles, clothed beneath 

 with white hairs ; crown piceous, beset on each side with black 



