Miss G Ricardo on the Asiliilse. 385 



general characters this species is allied to the group repre- 

 sented by D. auriburbis ; it differs very much in size, but I 

 can rind no cbaracter to distinguish the small specimens 

 from the larger ones. 



A species distinguislied by the yellow beard in the males, 

 with some black hairs above in the females, by the usually 

 honey-yellow basal half of the tibise, which in the two fore 

 pairs have long yellow pubescence, by the yellow bristles and 

 hairs on the posterior part of the thorax, and by yellow hairs 

 and bristles on the scutellum. Ovipositor in male long, 

 black, *\vith some briglit yellow pubescence. 



Length, ^ ty; e 15^, ? type I5i mm.; other males 12- 

 22, other females 12-20 n)m. 



Male. — Face bronze-green with some white tomentum, 

 convex, carrying a fairly thick moustache composed of long 

 weak yellow hairs with three or four black ones below 

 tlie antennae. Beard vellow. Antenna bronze-erreen, the 

 third joint dark brown, the first two joints with chiefly 

 black bristly pubescence : the arista nearly half as long as 

 the third joint. Forehead Avith black bristly pubescence. 

 The curved bristles at back of head not very long, all 

 yellowish, as are the hairs round head. Thorax bronze-black 

 with brownish-grey tomentum and very well-maiked doul)le 

 median stripe and side-stripes. Mane not very thick, com- 

 posed of short black hairs on the anterior half with three or 

 four very long stout outstanding bristles ; beyond these tlie 

 few hairs are yellow surrounded by many stout yellow 

 bristles ; all the bristles at sides and at base of wings are 

 yellow ; pubescence on dorsum sparse, of short black hairs. 

 Scutellum with long weak yellowish-white bristles on the 

 posterior border and weak yellow hairs on the dorsum. 

 Abdomen blackish, covered with grey tomentum and with 

 short yellow pubescence, the i)ristlcs at sides yellow, weak, 

 the tomentum often thicker at sides and on posterior 

 borders of segments ; imderside with weak fairly long 

 whitish hairs. Lcffs black, shining, the tibi;v honey-yellow 

 on the basal half, on the fore pair extending almost two- 

 thirds of the length ; the femora with a little short yellow 

 pubescence and with longer yellowish hairs above and 

 below, the hind pair with white bristles below ; the fore 

 tibiie with long yellow hairs and yellow pubescence, the 

 mid-pair the same ; the hind pair with shorter yellow 

 hairs, the bristles on this latter tliiefly yelljw, on tlie others 

 mostly black ; the tarsi with long yellow bristles and 

 shorter black ones, ll'viys clear, veins }cllowisli, the small 



