920 REPORT OF THE HARVARD AFRICAN EXPEDITION 
Tabanus besti var. arbucklei Austen 
Tabanus besti var. arbucklei Austen, 1912, Ann. Mag. Nat. Hist., (8) IX, p. 363 ( 9; Bo, Sierra 
Leone). 
Liperta. — Lenga Town, August 1926. Memmeh Town, August 25, 1926. 
Du River (Camp No.3), August 1926. Reppo’s Town, September 1926. Gbanga, 
September 1926. Bakratown, September 30, 1926. Paiata, October 1926. 
Kolobanu, October 29, 1926. Betala, October 13, 1926. Banga, October 1926. 
Bomboma (Moala), October 31, 1926. Moylakwelli, October 27, 1926. Mt. 
Coffee (R. P. Currie. — U.S.N.M.). 
This is an extreme variation of 7’. besti in which the pale basal portion of the 
fore tibiae is reddish yellow instead of white. It is, however, connected by tran- 
sitional specimens with the typical 7’. best’, which occurs together with it. In 
Liberia this variety is one of the abundant forest horse-flies, often numerous in 
clearings or along paths through virgin rain forest. 
The var. arbucklei is known only from Sierra Leone, Liberia, and the Gold 
Coast. 
At Paiata, Dr. Max Theiler found two females of this tabanid infected with 
an intestinal flagellate, probably of the genus Crithidia. 
Tabanus obscurehirtus Ricardo 
Tabanus obscurehirtus Ricardo, 1908, Ann. Mag. Nat. Hist., (8) I, p. 874 (9; Lutete, Belgian 
Congo). Surcouf, 1909, ‘Et. Monogr. Taban. Afrique,’ pp. 64 and 74, Pl. II, fig. 10 (¢). 
Liperia. — Lenga Town, August 13, 1926. The eyes in life are uniformly 
bright green. 
BELGIAN Conco. — Walikale, January 1925; Isangi, January 8, 1927; 
Coquilhatville, December 19, 1926. Kabinda (J. Schwetz). Miao (Baugniet). 
Eala; Ingende (Mayné). Ruwe to Kambove (8. A. Neave). Lukombe (Koller). 
Stanleyville, one female and one male, prey of Bembix bequaertt Arnold var. dira 
Arnold (H. Lang and J. P. Chapin). 
Male (undescribed). — Length of body, 16 mm. 
Except for the enlarged, holoptic eyes, it shows no difference from the female. 
One specimen from Stanleyville. 
T. obscurehirtus is a West African species, known from Southern Nigeria, 
Cameroon, Spanish Guinea, and the French and Belgian Congo. 
Tabanus obscurehirtus var. lubutuensis, new variety 
Female. — Length, about 15 mm.; width of head, 6mm.; frons at vertex, a trifle over 0.5 mm.; 
length of wing, 12 mm. 
Dorsum of thorax brown, without markings; frons slightly narrowed below; antennae yellow- 
ish brown; abdomen brown, slightly lighter colored basally; wings fumose, darkest along the 
costa; legs largely yellowish brown, fore femora, tips of fore tibiae and their tarsi somewhat darker 
than the basal parts of the fore tibiae. Eyes bare. All the posterior cells open. Fork of third 
longitudinal vein without appendix. 
Head: frons and face unicolorous, bright yellowish pollinose and pilose; beard very nearly 
the same color; proboscis dark brown; palpi rather slender, aithough distinctly larger at base 
than at apex, reddish yellow; antennae bright yellowish brown, first segment rather small, third 
