Diptera from South Africa. 101 
middle of the discal cell and the base of the second longi- 
tudinal is opposite it, the first posterior cell is slightly 
narrowed at its opening. 
Length 17 millim. 
I. Wings clear at base, the fore border with dark shading from which a 
dark band crosses the wing attaining the posterior border. 
This species is distinguished by the wings, which apparently 
differ from any South African Exoprosopa species as yet 
described, and requires a new group in Loew’s Division I., 
defined as above. 
Exoprosopa nova, sp. a. 
Two males from Fort Jchnston, Nyasaland (Rendall) ; 
one female from Delagoa Bay (Mrs. Monteiro), in the British 
Museum Collection. 
Black, with red on the sides and apex of abdomen, red 
scutellum, and reddish-yellow face. 
Face red, light yellow round the mouth, pubescence black 
and yellow en the red parts, light yellow round the mouth, 
with bright yellow scaly hairs; forehead black on the 
vertex, with a narrow black stripe on each side bordering 
the eyes nearly as far as the antennz, pubescence black. 
Antenne black, the first two joints with black hairs; the 
bristle stout, as long as the third jot. Hind part of head 
with yellow scaly hairs. Collar of bright yellow hairs. 
The sides of thorax and above the halteres with yellow 
pubescence and a few black hairs above; breast with paler 
yellow hairs. Thorax blackish brown, with yellow scaly 
hairs. Scutellum red, black at the base, with yellow scaly 
hairs and black bristles. Abdomen black, with red on the 
lateral borders of all the segments except the first, and with 
a narrow red band on the posterior borders, broader on the 
fifth and sixth, the seventh segment is wholly red; pubes- 
cence black, with some yellow scaly hairs, which are most 
noticeable on the sides and on the last two segments ; sides 
of abdomen with yellow hairs on the first two segments, 
black on the remainder; underside red, with thick and fairly 
long white pubescence. Legs black, with yellow scaly hairs 
on the femora and tibia; pubescence and bristles black. 
Wings grey, yellowish red at the extreme base and on the 
fore border, not quite reaching the Junction of the first longi- 
tudinal vein in the border; the dark brown band extends in 
an oblique direction to the posterior border, filling the first 
third of the first posterior cell, nearly the balf of the discal 
and fourth posterior cells, the base of the third posterior and 
