ENTOMOLOGY 923 
Male (undescribed). — Length of body, 13 to 16 mm. 
Of a lighter color than the female, more mahogany brown or reddish brown. Legs more 
reddish. Eyes very large, holoptic; the area of larger facets occupying about the upper two- 
thirds and rather widely separated from the occipital margin. 
Eleven specimens from Stanleyville. 
T. obscurior is known with certainty from the Belgian Congo only. Neave 
(1912, Bull. Ent. Res., II], p. 322) includes it in the list of Uganda tabanids, 
but I have been unable to find a definite locality record from that territory. 
Tabanus obscuripes Ricardo 
Tabanus obscuripes Ricardo, 1908, Ann. Mag. Nat. Hist., (8) I, p. 275 (9; Zegi, Lake Tsana, 
Abyssinia). Neave, 1912, Bull. Ent. Res., III, p. 298 ( ¢ &). 
BELGIAN Conao. — Kaparawe; between the Lufupa and Lubudi rivers 
(S. A. Neave). Lubumbashi River (Elisabethville) (Mich. Bequaert). 
NorTHERN RuopxEsta. — Kafue River (Mich. Bequaert). 
Although 7. obscurtpes is very closely allied to T. obscurior, I believe it may 
be separated by the characters given in the key. It is probably the East African 
representative of 7’. obscurior, being known at present from Abyssinia, Tangan- 
yika Territory, Upper Katanga, Northern Rhodesia, Nyasaland, and Portu- 
guese East Africa. The specimens from Ruwe, Katanga, which Miss Ricardo 
doubtfully referred to T. obscuripes, were almost certainly that species. 
Tabanus fuscomarginatus Ricardo 
Tabanus fuscomarginatus Ricardo, 1908, Ann. Mag. Nat. Hist., (8) I, p. 273 (9; Kampala- 
Kiadondo, Uganda). Surcouf, 1909, ‘Et. Monogr. Taban. Afrique,’ pp. 44 and 50, Pl. II, 
fig. 1'C9), 
BELGIAN Congo. — Lisala, December 28, 1927; Djambi (between Bomili 
and Avakubi); Walikale; Lubutu. Avakubi; Panga; Akenge (H. Lang and 
J.P. Chapin). Yambema Mabote (Van der Haegen). Lower Kasai (Vanderyst). 
I am by no means satisfied that 7’. fuscomarginatus is specifically distinct 
from the common and widely spread 7. ruficrus Palisot de Beauvois. I am 
unable to discover any morphological difference between the two. 
T. fuscomarginatus has been recorded from the French Congo, the Belgian 
Congo, and Uganda. 
Tabanus ruficrus Palisot de Beauvois 
Tabanus ruficrus Palisot de Beauvois, 1805-1821, ‘Insectes Recueillis en Afrique et Amérique,’ 
p. 55 (@; Oware, Southern Nigeria). Austen, 1909, ‘Illustr. African Blood-Suck. Flies,’ 
p. 92, Pl. VII, fig. 48 (9). 
Tabanus rufipes Palisot de Beauvois, 1805-1821, ‘Insectes Recueillis en Afrique et Amérique,’ 
Atlas, Pl. I (Dipt.), fig. 3 ( @; probably a clerical error for ruficrus). 
Tabanus deyrollet Bigot, 1858, in Thomson, Archives Entomol., II, p. 349, Pl. XI, figs. 5 and 5a 
(2; no locality mentioned, but the specimen came from the Gaboon). 
Tabanus pervasus Walker, 1850, ‘Insecta Saundersiana,’ I, Dipt., p. 43 ( 9; West Africa). 
I strongly suspect that 7’. dilutiws Surcouf (1907, Bull. Mus. Hist. Nat. 
Paris, XIII, p. 39; ¢; Libreville, French Congo) will also prove to be a syn- 
onym of 7. ruficrus. It was originally described as a variety of that species. 
