408 LIST OF DIPTERA. 



black ; poisers yellow. Fern. — Abdomen hoary along each side and 

 on the hind borders of the segments, black and shining at the tip, 

 which is pointed and compressed : legs black ; shanks sometimes 

 very dark ferruginous till near the tips : wings reaching when 

 closed a little beyond the tip of the abdomen. Length of the body 

 10 — 11 lines ; ofthe wings 15 — 16 lines. 



a. Sierra Leone. Presented by the Rev. D. F. Morgan. 



Asilus Antidomus, n. s., mas. Niger , abdomine fulvo , antennis pe- 

 dibusque nigris, tibiis ferrugineis, alisfuscis. 



Body stout, black : head narrower than the chest, thickly 

 clothed beneath with white hairs, beset behind the eyes with a row 

 of black bristles ; sides of the crown and front covered with some 

 black hairs ; front and clypeus ferruginous ; clypeus thickly beset 

 with black bristles, and having also in the front some more slender 

 white bristles : eyes dark bronze, rather large, fore part nearly flat, 

 its facets but little larger than those elsewhere on the eye: lip 

 black, very stout, thickly clothed with hairs, which are long and 

 white towards its base, but short and tawny towards its tip : first and 

 second joints of the feelers black, clothed with short black bristles; 

 second joint about half the length of the first : chest and breast deep 

 velvet-like black, partly clothed with short black hairs ; sides and 

 hind part ofthe chest beset with some black bristles : abdomen taw- 

 ny, and clothed with tawny hairs, much narrower than the chest, 

 and less than twice its length, becoming much narrower at one half 

 of its length, and thence tapering slightly to the tip ; sides of the 

 segments thickly clothed with long hairs from the first to the fourth, 

 but thinly clothed with short hairs from thence to the tip : first and 

 second segments short ; third segment long ; fourth segment a little 

 shorter and narrower than the third ; fifth segment much narrower 

 and a little shorter than the fourth ; sixth segment shorter and nar- 

 rower than the fifth ; seventh segment nearly as long and as broad 

 as the sixth ; eighth segment a little longer and narrower than the 

 seventh; ninth segment very short: appendages large, piceous, 

 shining : legs black, clothed with short black hairs ; shanks dark 

 ferruginous ; claws black ; foot-cushions piceous : wings dark brown ; 

 wing-ribs piceous ; veins black ; poisers piceous. Length of the 

 body 14 lines ; ofthe wings 22 lines. 



a. Brazil. 



Var. £. ? Lip partly red ; palpi red, clothed with very pale yel- 

 low hairs, and beset with black bristles: first and second joints of 

 the feelers red ; third joint piceous, spindle-shaped, nearly as long 

 as the first; bristle black, nearly twice the length of the first joint : 



