LIST OF DIPTERA. 393 



adorned on each side of the base with a few tufts of bright yellow 

 hairs ; hind borders of the segments and the whole of the under-side 

 hoary ; first and second segments veiy short ; third and following 

 segments long, but successively decreasing in length : legs black, 

 clothed with yellow hairs and armed with black spines ; shanks 

 bright tawny, with black tips ; claws black ; foot-cushions dark 

 tawny : wings slightly tawny or colourless ; wing-ribs and veins fer- 

 ruginous, the latter piceous towards the tips ; poisers pale ferrugi- 

 nous. Length of the body 12 lines ; of the wings 20 lines. 



a. China. Presented by J. Keeves, Esq. 



b. China. Presented by G. T. Lay, Esq. 



Group IV. 



Asilus Philus, n. s., fern. Niger, pilis ferrugineis vestitus, abdomine 

 nigro-piloso apice compresso, antennis nigris, pedibus rufis nigro- 

 variis, alis fulvis apice cinereis. 



Body black : head narrower than the chest, covered with fer- 

 ruginous down, clothed behind and beneath with ferruginous hairs ; 

 clypeus armed with ferruginous bristles : eyes bronze, large ; fore 

 part fiat, its facets much larger than those of the other part : lip 

 black, clothed at the tip with tawny hairs ; palpi black, clothed with 

 long black hairs : feelers black ; first and second joints clothed with 

 tawny down and beset with long black hairs ; second joint much 

 shorter than the first ; third joint nearly as long as the first and the 

 second joints, tapering from the base to the tip ; bristle nearly twice 

 the length of the third joint : chest covered with ferruginous down 

 and clothed with ferruginous hairs : breast gray : abdomen black 

 and clothed with black hairs, nearly linear for half the length from 

 the base ; the last four segments forming a slender tail ; first and 

 second segments very short, clothed with ferruginous hairs ; third 

 and following segments long, but successively decreasing in length : 

 legs red, clothed with black hairs above and with tawny hairs be- 

 neath, beset with black bristles ; hips, thighs at the base and espe- 

 cially on the upper side, knees and feet black ; base of feet red ; 

 claws black ; foot-cushions tawny ; tips of hind shanks piceous : 

 wings tawny, gray at the tips and thence half the length of the 

 hind border ; wing-ribs ferruginous ; veins piceous ; black towards 

 the tips ; poisers pale ferruginous. Length of the body 12 lines ; of 

 the wings 19 lines. 

 a. Silhet. From the Rev. J. Stainforth's collection. 



