﻿Boinhyliidae (Dipfera) from Central Africa. 653 



tively. I think that the distinction of IT. 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. 

 Davcy) ; three specimens from Northern Nigeria, Zungeru, 

 November 5, 1910 {Dr. J. W. Scott Macfic), and Dinia 

 River, November 2G, 1910 (-/. J. Sitiiiison) ; two specimens 

 from Uganda, Oeta, December 15, 1910 {C. C. Goivdey). 

 The type-locality was Fort Johnston in Nyasaland. 



76. Hjipcrcdonia nigripcnnis, 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. Hypcralonia thyriclopliora, sp. nov. (Plate L, fig. 26.) 



$ . 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, Kai'sch (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 a];)ply to some different species, perhaj^s 

 of the group of E. ajncalis, 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 ; haltères 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 



