Miss G Ricardo on the Asilide, 385 
general characters this species is allied to the group repre- 
sented by D. auribarbis ; it differs very much in size, but I 
can find no character to distinguish the small specimens 
from the larger ones. 
A species distinguished by the yellow beard in the males, 
with some black hairs above in the females, by the usually 
honey-yellow basal half of the tibie, 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. Oviposjtor in male long, 
black, with some bright yellow pubescence. 
Length, ¢ type 154, 2 type 154 mm.; other males 12- 
22, other females 12-20 mm. 
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 
the antenne. Beard yellow. Antenne bronze-green, 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 with 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-marked double 
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 the 
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 bristles at sides yellow, weak, 
the tomentum often thicker at sides and on posterior 
borders of segments ; underside with weak fairly long 
whitish hairs. Legs black, shining, the tibie 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 
tibiz with long yellow hairs and yellow pubescence, the 
mid-pair the same; the hind pair with shorter yellow 
hairs, the bristles on this latter chiefly yellow, on the others 
mostly black ; the tarsi with long yellow bristles and 
shorter black ones. Wings clear, veins yellowish, the small 
