454 LIST OF DIPTERA. 



Asilus Alethes, n. s., mas. et fem. Fuscus, thoracis vittis tribus 

 lateribus pectoreque pallidioribus, abdominis fas ciis cinereis apice 

 nigro, antennis pedibusque nigris, tibiis tarsorumque articulis 

 basi ferrugineis, alis limpidis, apicibus marginibusque posticis 

 cinereis. 



Male. — Body dark brown: head a little narrower than the 

 chest, furnished with a few black hairs on the crown, beset behind 

 with black bristles, clothed beneath with pale yellow hairs ; clypeus 

 beset with black bristles behind and with pale yellow bristles 

 in front : eyes black ; fore part flat, distinct from the other part and 

 with larger facets : lip black, shining, clothed at the base with long, 

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

 long black bristles : feelers black ; first and second joints beset with 

 black bristles ; second joint much shorter than the first ; third joint 

 spindle-shaped, longer than the first and the second ; fourth and 

 fifth joints like a bristle, which is much shorter than the third : chest 

 with three paler stripes, beset on each side aud behind with black 

 bristles; sides and breast paler: abdomen clothed at the tip with 

 yellow hairs, and towards the base with yellow bristles, narrower 

 than the chest, and a little more than twice its length ; sides and 

 hind borders of the segments gray; third, fourth, and fifth segments 

 long and of equal length ; sixth and following segments shorter ; 

 tip black, shining : legs black, clothed with short yellow hairs, and 

 beset with some black bristles of various length, most thick on the 

 feet ; shanks and each joint of the feet ferruginous at the base; 

 first joint of the four front feet mostly ferruginous ; claws black, 

 ferruginous at the base ; foot-cushions tawny : wings colourless, 

 gray at the tips and along the hind borders ; wing-ribs ferruginous ; 

 veins black, piceous towards the base ; foot-cushions ferruginous ; 

 poisers tawny. Female. — Abdomen tapering from the base to the 

 tip, about thrice the length of the chest ; segments from the third 

 to the eighth successively decreasing in length ; ninth segment slen- 

 der, black, shining, narrower than the eighth : hind feet, and nearly 

 the whole of the other feet quite black. Length of the body 7 — 8 

 lines; of the wings 10 — 12 lines. 

 a. New York. Presented by the Entomological Club. 



Asilus Antimachus, n. s. Fuscus,flavo pilosus, thoracis vitta unica 

 pallida lateribus pectoreque albido-fulvis, abdomine apice nigro, 

 pedibus ferrugineis, alis limpidis, apicibus marginibusque posti- 

 cis subfuscis. 



Body brown : head as broad as the chest, clothed with pale 

 tawny down, thickly covered behind with pale yellow hairs and some 



