Bombyludae (Diptera) from Central Africa. 653 
tively. I think that the distinction of H. vittata from 
rufa, Wied., is not an easy matter. 
Five specimens from North Nyasa, Kaporo, Deep Bay 
and Mwiniwanda, June and October 1909 (Dr. J. B. 
Davey) ; three specimens from Northern Nigeria, Zungeru, 
November 5, 1910 (Dr. J. W. Scott Macfic), and Dinia 
River, November 26, 1910 (J. J. Simpson); two specimens 
from Uganda, Oeta, December 15, 1910 (C. C. Gowdey). 
The type-locality was Fort Johnston in Nyasaland. 
76. Hyperalonia nigripennis, Loew (1852). 
A single specimen from Northern Nigeria, Gau, Decem- 
ber 17, 1910 (J. J. Simpson). This species seems to be 
widely spread over Central Africa, as I have seen also a 
specimen from the Belgian Congo. Basal comb of the 
wing black. All the hairs of the sides and underside of the 
thorax and abdomen are of a golden yellow colour, which 
renders them conspicuous on the black ground-colour of 
the body. The metallic reflections of the wings are very 
strong, and in this the species agrees with H. helena, 
Loew, of which I have seen specimens from Erythraea. 
77. Hyperalonia thyridophora, sp.nov. (Plate L, fig. 26.) 
2. Length of the body 18 mm., of the wing 20 mm., of the wing- 
expanse 44 mm. 
A very distinct species, which I shall name, although the single 
specimen is without a head. The wing-pattern recalls that of H. 
venus, Karsch (1887), which has also a large hyaline spot in the 
second basal cell; but this last species shows also hyaline spots in 
the discal, anal, and third and fourth posterior cells, which are 
wanting in my species. ‘The re-description of the species given by 
Speiser in 1907 seems to apply to some different species, perhaps 
of the group of FE. apicalis, Wied.; at least in the species to be 
described here the tibiae are not pennate. 
Thorax black, clothed with grey hairs and with some scattered 
black hairs on the sides; collar and pleurae with entirely yellowish 
grey hairs, also on metapleural tufts; bristles black. Squamulae 
yellowish, with a white fringe; halteres black, with paler knob. 
Scutellum dark red, narrowly black at base, with marginal black 
bristles. Abdomen black, the segments being narrowly yellowish at 
the hind border; hairs of the colour of those on the thorax, but each 
segment bears on the sides at the hind margin some black hairs, 
which are more numerous on the last segments; under the hairs 
