418 LIST OF DIPTERA. 



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

 front with longer and more slender pale yellow bristles : eyes dark 

 bronze ; fore part nearly flat, its facets rather larger than those of 

 the other part ; lip blaclc, long, clothed at the tip with short tawny 

 hairs ; palpi black, clothed with tawny hairs : feelers black ; first 

 and second joints beset with short black bristles ; second joint fer- 

 ruginous, about half the length of the first ; third joint spindle- 

 shaped, ferruginous at the base, nearly as long as the first ; bristle 

 full twice the length of the third joint: chest dull grayish ferrugi- 

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

 with black bristles: breast gray: abdomen gray, convex, clothed 

 with tawny down, tapering from the base to the tip, narrower than 

 the chest, and full twice its length ; first and second segments short ; 

 third and following segments long, but successively decreasing in 

 length : legs red, thinly clothed with tawny and black hairs, and 

 armed with black spines ; feet darker towards the tips ; claws black ; 

 foot-cushions tawny ; a black stripe along each of the hind thighs : 

 wings pale brown ; wing-ribs piceous ; veins black; poisers tawny. 

 Length of the body 13 lines ; of the wings 21 lines. 



Asilus Malleolus, n. s., mas. Fuscus, thoracis vittis ferrugineis 

 tribus et cinereis quatuor, pectore cano, antennis nigris, pedibus 

 rufis,tibiis apice tarsisque nigris, alls flavo-fuscis. 



Head large, a little narrower than the chest, covered with yel- 

 low down, thickly clothed behind and beneath with pale yellow 

 hairs, beset behind the eyes with a row of black bristles ; crown on 

 each side and tubercle of the eyelets beset with black hairs ; clypeus 

 very prominent, thickly armed with long pale yellow bristles, and 

 furnished with some black hairs behind, and with a few black bris- 

 tles in front : eyes large, bronze ; fore part nearly flat, its facets 

 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 beset with short black 

 hairs ; second joint club-shaped, a little more than half the length 

 of the first : chest brown, broad, thinly clothed with short black 

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

 with three ferruginous, and with four gray stripes ; hind part of the 

 chest and breast hoary : abdomen brown, narrower than the chest, 

 and less than twice its length, tapering from the base to the 

 tip, thickly clothed with long tawny hairs ; first and second seg- 

 ments very short ; second segment arched, armed on each side with 

 some black bristles; third and following segments long, successively 

 decreasing in length ; sexual parts black, shining : legs dark 



