462 LIST OF DIPTERA. 



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

 short whitish hairs ; tongue tawny ; palpi black, beset with black 

 hairs: feelers black ; first and second joints beset with black hairs; 

 second joint cup-shaped, about half the length of the first; third 

 joint obconical at the base, tapering thence to the tip, a little shorter 

 than the first and the second joints ; bristle stout, as long as the third 

 joint, widened near the tip, which is much more slender than any 

 other part : chest and breast gray : chest clothed with long black 

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

 three black stripes ; middle stripe tapering from the fore border to 

 the hind border; side stripes broader and shorter, each interrupted 

 by an oblique gray band: breast partly clothed with white hairs: ab- 

 domen dark brown, clothed with short black hairs, beset on each side 

 with long white hairs, narrower than the chest, and much more 

 than twice its length, tapering from the base to the tip, which 

 is compressed, black, and shining; hind borders of the segments 

 hoary ; under-side gray ; first and second segments short ; third and 

 following segments long, successively decreasing in length: legs 

 black, clothed with short white hairs, armed with long black spines ; 

 hips and thighs clothed with long white hairs ; hips gray ; shanks 

 and feet tawny, piceous towards the tips; claws black, tawny 

 towards the base ; foot-cushions tawny : wings very slightly tinged 

 with brown ; wing-ribs and veins black ; poisers tawny. Length of 

 the body 4 lines ; of the wings 8 lines. 



a, ? From Mr. Children's collection. 



Asilus Dasius, n. s., fern. Fuscus, thoracis vittis obscurioribus, ab- 

 dominis fasciis fulvis, apice compresso nigro nitente, antennis 

 nigris, pedibus rufis, femoribus tibiisque apice piceis, tarsis 

 nigris, alis limpidis. 



Head as broad as the chest, covered with hoary down, clothed 

 behind and beneath with white hairs, beset behind the eyes with 

 white bristles ; clypeus armed with long white bristles and hairs : 

 eyes reddish bronze ; fore part flat, composed of large facets : lip 

 black, clothed at the tip with short whitish hairs : feelers black ; 

 first and second joints beset with a few black hairs ; second joint 

 about half the length of the first; third joint tapering from the 

 base to the tip, nearly as long as the first and the second ; bristle 

 stout, shorter than the second : chest and breast dark tawny: chest 

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

 with some black bristles, adorned with indistinct darker stripes : ab- 

 domen brown, narrower than the chest, and much more than twice 

 its length, thinly clothed with short pale hairs, tapering from 



