Bombyliidae (Diptera) from Central Africa. 651 
Davey), which agree well enough with this Mediterranean 
species. 
72. Exoprosopa hypomelaena, sp. nov. 
@. Length of the body 10 mm., of the wing 8 mm. 
A small species with hyaline wings, very closely allied to the 
preceding but differing in the following points. 
Third antennal joint broad at the base, afterwards attenuated into 
a point, which ends in a style as long as this point. Lower half of 
pleurae and breast clothed with black hairs. The four front tibiae 
are yellow. Wings with the base and the costal cell only a little 
grey, almost hyaline ; the direction of the veins is the same, but the 
anal cell is more narrowed at the end. 
Type 9, from West Nyasa, Chinktu, October 1909 
(Dr. H. 8. Stannus) ; a single not well preserved specimen. 
73. Exoprosopa (?) inornata, Loew (1860). 
A single specimen of very doubtful determination, from 
West Nyasa, Limpachi River, November 1909 (Dr. Z. 8. 
Stannus). 
74. Exoprosopa sp. indet. 
A single badly preserved and wholly denuded specimen 
of a species very near £. iris, Loew, from North Nyasa, 
Fort Hill, September 26, 1909 (Dr. J. B. Davey). 
16. Hyperalonia, Rondani (1868). 
This genus seems to be somewhat plentiful in South 
Africa; in the collection there are four species, which 
belong to two very distinct groups. 
The first group embraces the species which have red, 
more or less darkened, legs and extensive brown markings 
on the wings, which are often all darkened and with strong 
metallic reflections. Hind claws with an obtuse tooth. 
Discal cell very much twisted, pointed outwardly, the vein 
dividing it from the second posterior cell being very 
sinuous and placed almost in the same direction as the 
axis of the wing; second posterior cell broader at base 
than at apex. ‘To this group belongs the species H. rufa, 
Wied., from the Cape; vittata, Ric., from Nyasa; nigri- 
pennis, Loew, from Mozambique; helena, Loew, from 
Egypt, and venus, Karsch, from Zanzibar. 
To the second group belong the species which have 
