Bombyliidae (Diptera) from Central Africa. 641 
short and sparse black hairs. Antennae with the first two joints 
of a red colour ; first joint very long ; third joint in the shape of an 
elongate cone, as long as the first two together and bearing a style 
shorter than itself. Proboscis black, long, but not projecting. Thorax 
black ; with the exception of the black bristles, all the other hairs 
seem to be yellowish, and those on the metapleura also. Squamulae 
of a dark colour, with a yellowish fringe ; halteres with yellow knob 
and dark stalk. Scutellum black, reddish at the hind margin, with 
black marginal bristles. Abdomen black, reddish on the sides of 
second and third segments and yellowish on the venter, which 
has only the basal portion of the segments darkened; third seg- 
ment with entire transverse band of white tomentum, fourth and 
fifth with interrupted bands, the others seem to be all covered 
with white tomentum; sides with black hairs. Legs wholly 
black, with black pubescence and black bristles, but the hind femora 
have yellowish tomentum towards the base; ungues long, with 
a very strong tooth. Wings hyaline, one-half brown; the limit 
of the dark fore border runs obliquely from the end of the second 
longitudinal vein along the middle of the discal cell to the base 
of the fourth posterior cell and to the middle of the anal cell. 
Prediscoidal spot greyish ; third longitudinal vein very curved at 
the end ; first posterior cell not narrowed ; the second vein beginning 
opposite to the small cross-vein; second, third and fourth posterior 
cells of about equal width. Discal cell longer than in E. dimidiata 
and much narrower towards the base; the vein dividing it from the 
second basal cell very strongly S-shaped. 
TYPE 2, from West Nyasa (Dr. H. S. Stannus); a single 
specimen. 
55. Exoprosopa dimidiata, Macquart (1846). 
I here follow Loew’s definition of this species; but it 
seems that the African fauna is very rich in allied species, 
some of which are very difficult to distinguish. 
The third antennal joint, which was wanting in Loew’s 
specimen, is of short conical shape, equal in length to the 
first two joints together and as long as the style which it 
bears; the first joint is short and black. Loew says that 
the pleurae bear also some black hairs, which, however, in 
the second specimen are sparse; in my specimen there 
are no black hairs; as stated by Loew, the metapleural 
tuft is always yellowish. 
A single specimen from Uganda, Peta, December 15, 
1910 (C. C. Gowdey). 
56. Exoprosopa discriminata, sp. nov. (Plate L, fig. 15.) 
