442 LIST OF DIPTERA. 



covered with golden down, clothed with yellow hairs, which are 

 longer and thicker towards the base, very slightly tapering from the 

 base to the tip, which is black and shining ; a broad black stripe 

 along the back ; first and second segments very short ; second seg- 

 ment arched; third and following segments long, successively 

 decreasing in length : legs bright red, clothed with black and whit- 

 ish hairs, armed with black spines ; hips, knees, tips of shanks, and 

 feet black ; claws black, red at the base ; foot-cushions tawny ; tips 

 of four hinder thighs black: wings rather short, slightly tawny, 

 gray towards the tips, and thence along half the length of the hind 

 borders ; wing-ribs ferruginous ; veins black, piceous at the base ; 

 poisers tawny. Length of the body 8 lines ; of the wings 12 

 lines. 

 a. West Australia. From Mr. Clifton's collection. 



Asilus Balacrus, n. s., mas. Fulvus, thoracis vittis quatuor fuscis, 

 abdominis fasciis pallidioribus, antennis nigris, pedibus rufis ni- 

 gro variis, alis subfulvis apice fuscis. 



Head black, as broad as the chest, clothed with tawny and 

 black hairs, and beset with a row of black bristles behind, clothed 

 beneath with white hairs ; front and clypeus adorned with silvery 

 down ; clypeus very prominent, clothed behind with a few long 

 black hairs, armed in front with a thick cluster of longer white 

 hairs : eyes large, bronze ; fore part flat, its facets much larger than 

 those of the other part: lip black, clothed at the tip with short pale 

 yellow hairs ; palpi black, beset with long black hairs : first and se- 

 cond joints of the feelers black, clothed with short black hairs ; 

 second joint slightly club-shaped, about half the length of the first : 

 chest dark tawny, clothed with black hairs, beset on each side and 

 behind with black bristles, adorned with four brown stripes, middle 

 stripes narrow and linear, side stripes shorter and broader, and each 

 interrupted by an oblique tawny band : breast tawny, with a gray 

 tinge, partly clothed with black hairs : abdomen narrower than the 

 chest and nearly twice its length, slightly tapering from the base to 

 the tip, thinly clothed with black hairs ; base and sides tawny ; hind 

 borders of the segments paler tawny ; each side of the fourth and of 

 the seventh segments armed with a few black bristles ; first and se- 

 cond segments very short, the latter arched, covered with pale tawny 

 down, adorned on each side with a cluster of tawny hairs ; third and 

 following segments long, but successively decreasing in length to 

 the tip ; sexual parts large, shining : legs red, thinly clothed with 

 short tawny hairs, armed with black spines ; feet black, clothed with 

 short black hairs; thighs and hind shanks striped with black: wings 

 with a slight tawny tinge, brown at the tips ; wing-ribs ferruginous ; 



