LIST OF DIPTERA. 419 



red, clothed with short yellow hairs, armed with black spines ; hips 

 black, clothed with long pale yellow hairs ; trochanters, knees, feet 

 and tips of shanks black ; foot-cushions tawny : wings yellowish 

 brown ; wing-ribs piceous; veins ferruginous ; poisers tawny. 



Var. /3. Body black, covered with white shining down, clothed 

 behind and beneath with white hairs ; clypeus armed with a very 

 thick tuft of long white bristles ; third joint of the feelers tapering 

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

 bristle longer than the third joint : chest gray, thinly clothed with 

 short black hairs, beset on each side and behind with a few black 

 spines, partly clothed with white hairs : abdomen gray, about twice 

 the length of the chest, hoary ; thighs covered with whitish hairs ; 

 feet piceous : wings tawny, nearly colourless at the tips ; veins 

 black. Length of the body 13 lines ; of the wings 24 lines. 



Asilus Pelago, n. s., mas. et fern. Piceus, capite nigro, thoracis 

 vittis quatuor nigris, antennis nigris, articulo 3 P ferrugineo, pedi- 

 bus nigris, tibiis basi fulvis, alls nigro-fuscis. 



Body piceous: head black, a little narrower than the chest, 

 clothed behind and beneath with white hairs, furnished with black 

 hairs on the crown, beset behind the eyes with a row of black bris- 

 tles ; clypeus armed with a very few long black hairs behind, and 

 with a thick tuft of pale yellow hairs in front : eyes black ; fore part 

 flat, its facets larger than those of the other part : lip black, shining, 

 clothed at the tip with short tawny hairs : feelers black; first and 

 second joints beset with short black bristles ; second joint a little 

 shorter than the first ; third joint dark ferruginous, spindle-shaped, 

 a little shorter than the first and the second ; fourth and fifth joints 

 like a bristle, shorter than the third: chest piceous, clothed with short 

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

 with four black stripes ; middle pair of stripes narrow and linear, 

 side pair shorter and broader; breast rather paler, clothed with white 

 hairs ; abdomen flat, red, tapering from the base to the tip, clothed 

 with pale yellow hairs, narrower than the chest, and a little more 

 than twice its length ; first and second segments very short, more or 

 less black; third and following segments long, successively, but 

 slightly decreasing in length ; eighth and ninth segments black ; 

 ninth segment slender, a little longer than the eighth : legs black, 

 clothed with yellow hairs and beset with black bristles ; shanks taw- 

 ny from the base to the middle ; claws black ; foot-cushions tawny : 

 wings very dark brown ; borders of some of the veins paler ; wing- 



