438 LIST OF DIPTERA. 



behind the eyes with black bristles ; tubercle of the eyelets beset 

 with a cluster of black bristles ; sides of the crown covered with 

 black hairs ; clypeus prominent, thickly beset with long yellow bris- 

 tles : 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 black hairs ; second joint 

 a little shorter than the first : chest and breast covered with golden 

 down : chest beset with a few black hairs and bristles on each side 

 and behind ; its disk mostly black : breast covered with a hoary 

 bloom, and partly clothed with hoary hairs : abdomen longer and 

 a little narrower than the chest, but not near twice its length, taper- 

 ing from the base to the tip, clothed with tawny hairs, which are 

 longest and most numerous at the base, adorned with a large golden 

 spot on the hind border of each segment ; first and second segments 

 very short ; third and following segments long, successively decreas- 

 ing in length to the tip, which is armed with a circlet of short black 

 spines : legs clothed with short yellow and black hairs, armed with 

 black spines ; thighs red ; shanks tawny ; hips, knees, feet, and tips 

 of thighs and of shanks black ; foot-cushions tawny : wings colour- 

 less, gray for one-third of the length from the tips and along 

 the hind borders ; wing-ribs piceous ; veins black ; poisers pale fer- 

 ruginous. Length of the body 7 lines ; of the wings 12 lines. 



a. ? From the Hardwicke bequest. 



Asilus Vibulanus, n. s., fern. Niger, thoracis vittis tribus lateri- 

 busque ferrugineis, pectore cano, abdomine fusco fasciis pallidio- 

 ribus, antennis nigris, pedibus piceis fulvo vittatis, alis subcine- 

 reis apicefuscis. 



Head nearly as broad as the chest, covered with hoary down, 

 clothed behind and beneath with white hairs, beset behind the eyes 

 with a row of black bristles ; crown covered with ferruginous down, 

 beset with a few black hairs on each side ; front and clypeus covered 

 with tawny down ; clypeus armed with some long black and pale 

 yellow bristles : eyes bronze ; fore part flat, its facets much larger 

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

 tawny hairs ; palpi black, beset with long black bristles : feelers 

 black; first and second joints covered with gray down, beset with 

 short black bristles; second joint about half the length of the first; 

 third joint spindle-shaped, as long as the first; bristle much larger 

 than the third joint : chest black, clothed with short and long black 

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

 with three ferruginous stripes ; middle stripe indistinct ; side stripes 

 connected by four oblique bands to the sides, which are also ferru- 



