944 REPORT OF THE HARVARD AFRICAN EXPEDITION 
Tabanus virgatus Austen, 1908, ‘Second Rept. Wellcome Res. Lab. Khartoum,’ p. 60, fig. 20 
(9; new name for 7’. dorsivitta Walker, 1854). 
Tabanus subelongatus var. proximus Corti, 1895, Ann. Mus. Civ. Genova, XXXV, p. 132 ( 2; 
Arussi Galla, Ganale Gudda, Abyssinia). 
Lrper1a. — Monrovia, one female, July 1926. St. Paul’s River, one female 
(O. F. Cook. — U.S.N.M.). 
Brteran Conco. — Mistandungu; Kwamouth; Irebu; Nouvelle-Anvers; 
all on the Congo River, December 1926; Ukaturaka, October 1913; Boma; 
Mufungwa (Sampwe). Lisala; between Bolobo and Lukolela; Coquilhatville; 
Faradje; Garamba (H. Lang and J. P. Chapin). Bumba; Leopoldville (J. 
Rodhain). Bongo (J. Maes). Kitobola (Feller). 
T’.. taeniola is widely distributed over the Ethiopian Region, from the Senegal 
and Upper Egypt to the Cape of Good Hope. It occurs in the rain forest as well 
as in the savanna. 
Tabanus sugens Wiedemann (1828, ‘Aussereurop. Zweifl. Insekten,’ I, p. 140; 
¢ ; Guinea) is an extremely doubtful species of the 7. lineola group. In 1913 
(Rev. Zool. Afric., II, p. 454), I referred to this species a female from Mufungwa 
(Sampwe), in Katanga. This specimen is now before me and after a careful 
study I have reached the conclusion that it is an aberrant specimen of 7’. taenzola. 
The antennae are wholly black. 
Tabanus denshamii Austen 
Tabanus denshamiu Austen, 1908, Ann. Mag. Nat. Hist., (8) I, p. 222 ( 9; between Masindi and 
Murchison Falls, Uganda); 1909, ‘Tllustr. African Blood-Suck. Flies,’ p. 108, Pl. IX, fig. 64 (¢). 
BELGIAN Coneo. — Faradje, two females (H. Lang and J. P. Chapin). 
This is a rare species, known from Kenya Colony, Uganda, the northeastern 
corner of the Belgian Congo, Katanga, Northern Rhodesia, and Nyasaland. 
Tabanus principis, new species 
Female. — Length, 15.5 mm.; width of head, 5 mm.; length of wing, 14 mm. 
A medium-sized, black species, with small triangular spots of pale tomentum and glistening 
hairs in the middle of the tergites; legs dark clove-brown, with paler tibiae; fore tibiae glistening 
dirty white basally, but not ringed. Wings slightly and fairly uniformly smoky. 
Head: frons and upper part of face (subcallus) pale russet pollinose, gradually passing into 
light gray pollinose in the lower part of the face; jowls gray pollinose, clothed with long silvery 
white hairs; the short, erect hairs of the frons black. Frons about six times as long as wide, scarcely 
narrowed toward the subcallus; the basal callosity elongate, widest at the base where it touches 
the eyes, gradually narrowed above where it ends rather abruptly, about twice as long as wide at 
the base; median callosity narrow, linear, reaching a little beyond the middle of the frons, connected 
with the lower callosity by a fine impressed line; a darker, dull hairy area on the vertex. Terminal 
segment of palpi swollen in the basal half, rather rapidly narrowed to the more slender, tapering 
apical half; pale dirty yellow, covered with short, appressed, black pile and a few white hairs nee 
the base below. Antenna of moderate length, brownish black, the third segment slightly reddish 
at base; first segment moderately large, not swollen, with black pile; second segment small 
moderately produced at the upper apex, with black pile; third segment elongate crescent-shaped, 
rather broad at base where it bears a blunt upper projection, slender in the apical two-thirds. 
Eyes bare, uniformly dark purple in life. Thorax black, covered beneath, on the sides and BbOre 
the base of the wing with a slate-gray pollen which also forms the beginning of two median bands 
at the anterior margin of the dorsum and some light spots at the transverse suture and near the 
