LIST OF DIPTERA. 431 



but successively decreasing in length lo the tip, which is shining and 

 quite black : legs ferruginous, stout, clothed with white hairs and 

 beset with black bristles ; thighs mostly black beneath ; feet and 

 foot-cushions piceous ; claws black : wings colourless, reaching 

 when closed to the tip of the abdomen ; wing-ribs dark ferruginous ; 

 veins ferruginous, piceous towards the tips ; poisers tawny. Length 

 of the body 9 lines ; of the wings 15 lines. 



a. South Africa. Presented by Dr. A. Smith. 



Asilus Centho, n. s., mas. Flavo-fuscus, thoracis vittis quinque 

 scutello metaihorace pectoreque fulvis, abdominis apice nigro, an- 

 tennis piceis ferrugineo cinctis, pedibus nifis, tarsis nigris, alis 

 limpidis, venisfulvo limbatis. 



Head piceous, much narrower than the chest, clothed behind 

 with some yellow bristles and white hairs, thickly clothed beneath 

 with longer white hairs ; crown furnished with some yellow hairs on 

 each side ; clypeus prominent, clothed with yellow hairs, beset in 

 front with long yellow bristles : eyes dark bronze, large ; fore part 

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

 long, its tip clothed with short tawny hairs ; palpi black, clothed 

 with long yellow hairs: first and second joints of the feelers clothed 

 with tawny hairs : first joint piceous, ferruginous towards the tip ; 

 second joint ferruginous, slightly club-shaped, rather more than 

 half the length of the first : third joint piceous, spindle-shaped, fer- 

 ruginous towards the tip, longer than the first ; bristle black, very 

 much longer than the third joint: chest yellowish brown, beset on 

 each side and behind with a few black bristles, and with some short 

 yellow hairs, adorned with five indistinct slender tawny stripes ; the 

 two side stripes on each side are close together; sides, scutcheon, 

 hind chest, and breast pale tawny: abdomen yellowish brown, 

 clothed with short yellow hairs, beset on the hind borders of the seg- 

 ments with some yellow bristles, tapering from the base to the tip, 

 much narrower than the chest, and full twice its length ; first 

 and second segments very short; second segment arched, thickly 

 clothed with long yellow hairs; third and following segments long, 

 but successively decreasing in length to the tip, which is black and 

 shining ; third and fourth segments thickly clothed with long yel- 

 low hairs ; under-side with a gray tinge : legs red, clothed with 

 short yellow hairs and with little black bristles, armed with black 

 spines ; hips gray ; fore pair clothed with long pale yellow hairs ; 

 knees and feet black ; fore feet and middle feet armed beneath with 

 short curved black spines, which have each a tooth near the middle ; 

 foot-cushions dark tawny : wings colourless, tawny along the fore 



