LIST OF DIPTERA. 425 



lique bands, and by one short stripe of golden down : sides of the 

 chest, scutcheon, and hind chest hoary : abdomen red, narrower than 

 the chest and full twice its length, slightly tapering from the base 

 to the tip, thinly clothed with short yellow hairs, which, however, 

 are longer and more numerous towards the sides of the hind borders 

 of the segments ; first and second segments gray, very short; second 

 segments arched, clothed with some long whitish hairs, and beset on 

 each side with a few whitish bristles ; third and following segments 

 long, successively decreasing in length to the tip, which is black and 

 shining; third segment crossed by two rows of black punctures near 

 the base, which is gray; sutures of the segments black; under-side 

 gray, clothed on each side with a few pale yellow hairs : legs red, 

 clothed with short black and long white hairs, armed with black 

 spines ; hips gray ; trochanters black ; feet black, covered on the 

 under-side like the shanks with tawny down ; claws black, red at the 

 base ; foot-cushions tawny : wings tawny ; wing-ribs and veins pi- 

 ceous ; poisers tawny. Length of the body 11 lines; of the wings 

 20 lines. 



,a. r 



Asilus Sydneensis ? mas. Maeq. Dipt. Exot. i. 2, 144, 23. 

 I a. Port Stephen, New Holland. Presented by the Earl of Derby. 



Asilus Alcetas, n. s., fern. Niger, capite fiavo pubescente pilisque 

 nonnullis canis et nigris vestito, clypeo setisflavis armato, thorace 

 vittis quinque flavis, pectore jlavo pubescente, abdomine pilis 



Jlavis vestito, antennis nigris, pedibus rufis, tarsis nigris, alis sub- 



fulvis. 



Head a little narrower than the chest, covered with pale yellow 

 j down, clothed behind and beneath with long hoary hairs, and beset 

 behind the eyes with a few black bristles ; crown clothed with a few 

 j black hairs ; clypeus beset with a few black hairs behind, and with 

 more and longer pale yellow bristles in front : eyes black ; fore part 

 slightly convex, its facets not much larger than those of the other 

 part, from which it is hardly distinguishable : lip black, short, 

 clothed at the tip with yellow hairs : first and second joints of the 

 feelers black, beset with black bristles ; second joint much shorter 

 than the first: chest with five dull pale yellow stripes, each stripe 

 beset with black bristles, the side stripes also armed with black 

 spines: breast clothed with pale yellow down: abdomen clothed 

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

 rower than the chest, and rather more than twice its length ; first 

 segment very short ; second segment short ; third segment long ; 

 fourth segment a little shorter; fifth segment full as long as 



2P2 



