Diptera from South Africa. 95 
segment; the hairs at the sides of abdomen are not so thick 
and the band on the second segment not so distinct ; the 
underside is red only at the base, then black, with white 
pubescence. Legs rather darker. 
This species is nearly allied to Hxoprosupa indecisa, 6, 
Walker, the single specimen of which (the type) is in the 
British Museum collection. 
Hxoprosopa unifasciata, sp. 0. 
Type (female), from Pretoria (W. L. D.). 
Black, with reddish face, antennee, legs, and scutellum. 
Face red, black beneath, the antennz with black pubes- 
cence and traces of yellow scaly hairs ; the forehead black, 
with yellow scaly hairs and black pubescence. Antenne 
reddish, the first two joints with black pubescence. Hind 
part of head with greyish scaly hairs; the collar consists of 
yellowish-brown hairs. ‘Thorax with yellowish scaly hairs 
and yellow hairs at the sides ; black bristles and black hairs 
at the base of wings. Breast-sides with sparse yellow and 
black pubescence. Scutellum red, black at the extreme base, 
bordered with black bristles and with greyish tomentum. 
Abdomen black, with a band of white hairs on the anterior 
border of the second segment, traces of white scaly hairs 
on the sides of the other segments and on their posterior 
borders; pubescence black, and at the sides of abdomen, 
except the first segment, where it is white; there is a trace 
of a red spot on the side of the second segment ; underside 
black, shining, with greyish pubescence on the basal half 
only. Legs reddish brown, with black pubescence and 
bristles. 
Wings grey, with dark brown shading on the fore border 
not quite reaching the junction of the auxiliary vein with the 
border, extending to the second basal cell, but so faint in 
that cell that the cross-veins enclosing it seem spotted, the 
dark shading round them being very conspicuous, so that 
the wing at first sight might belong to Division G of Loew. 
The discal cell is almost clear except at its base and along its 
anterior side bordered by the fourth longitudinal vein ; 
the base of the second longitudinal vein is just below the 
small cross-vein ; the first posterior cell is somewhat narrowed 
at its opening, the second and third about equal in width. 
Length 104 millim, 
