1933 ] 
Notes on Hippoboscidae 
81 
off Halixtus vocifer (Daudin) ; Nsadzi Island, Lake Vic- 
toria, Uganda). Neave, 1912, Ibidem , III, p. 322. 
Lynchia dukei Falcoz, 1930, Encyclop. Entom., Diptera, V, 
p. 48. 
Ornithomyia nigricans C. W. Johnson, 1898, Proc. Ac. Nat. 
Sc. Philadelphia, p. 164. Not of Leach. 
Specimens Examined. — Belgian Congo: Kwamouth (J. 
Maes) ; Ganda Sundi, two specimens off a bird of prey (H. 
Schouteden) ; M’Bamu Island in the Stanley Pool, one male 
(E. Roubaud. — Paris Museum) ; Elisabethville, three fe- 
males off Bateleur Eagle, Terathopius ecaudatus (Daudin) 
(J. De Riemaecker). — Abyssinia : Dada, near the Daroli 
River, one male and one female (A. D. Smith. — Ac. Nat. 
Sc. Phila. ; specimens recorded by Johnson, 1898, as O. 
nigricans ) . 
This species, the type of which is at the British Mu- 
seum, is exceedingly close to L. nigra (Perty) and I am by 
no means satisfied that it is distinct. Austen writes that it 
is distinguishable from Olfersia intertropica (Walker) (a 
synonym, in my opinion, of L. nigra) “by its more elongate 
and darker palpi, by the hairs and punctures on the inner 
borders of the sides of the front being fewer in number and 
coarser, and especially by the different shape of the shining 
plate on the vertex, which is more transversely elongate, 
and the anterior angles of which are more abruptly rounded 
off.” Of these differences, only the shape of the postvertex 
(as indicated in my key) seems reliable in the series of 
dukei and nigra studied. The length of the palpi in dried 
specimens varies with the retraction of the proboscis; and 
I can detect no difference in the number and coarseness of 
the hairs on the inner orbits of perfectly preserved speci- 
mens (the punctures being the insertions of the hairs). 
Austen gives the length of the wing as 9.4 mm., but this 
must be unusual, since the wing in my specimens reaches 
at most 8.5 mm. in length. 
Lynchia penelopes Weyenbergh 
Lynchia penelopes Weyenbergh, 1881, Anales Soc. Cientif. 
Argentina, XI, p. 199 ( $ $ ; off Penelope canicollis Wag- 
ler; Province of Tucuman, Argentina). Brethes, 1907, 
