942 REPORT OF THE HARVARD AFRICAN EXPEDITION 
Tabanus regnaulti Surcouf 
Tabanus regnaulti Surcouf, 1912, Bull. Soc. Ent. France, p. 183, fig. 1 (on p. 184) (@; Sangha 
River, French Congo). 
Brean Congo. — Walikale, January 1915; Lubutu, January 26, 1915; 
Penge, February 1914. Mawambi (C. Christy). Ponthierville, December ZT, 
1923 (Mich. Bequaert). Stanleyville, March 1915, seven females and four males, 
as prey of Bembix bequaerti Arnold var. dira Arnold (H. Lang and J. P. Chapin). 
Male (undescribed). — Length of body, 27 mm.; width of head, 5.5 mm.; length of wing, 
14 mm. 
Resembling the female closely and readily associated with it. The abdominal markings are 
somewhat less conspicuous, which is the usual sexual difference in this group of Tabanus. The 
basal ring of the fore tibiae is pale reddish rather than white. Head hemispherical; the eyes 
holoptic, with a zone of larger facets very sharply set off, occupying more than the upper two- 
thirds and widely separated from the occipital margin. 
Four specimens from Stanleyville. 
This species agrees in many respects with 7’. quadrisignatus Ricardo, having 
also four conspicuous longitudinal stripes over the dorsum of the thorax. It 
differs, however, in many particulars, notably in the width of the frons which 
is over five times as high as wide at the vertex. 
T. regnaultt is a species of the Congo rain forest, which has not yet been found 
in Upper Guinea. 
Tabanus nyasae Ricardo 
Tabanus nyasae Ricardo, 1900, Ann. Mag. Nat. Hist., (7) VI, p. 164 ( ¢@; Fort Johnston, Nyasa- 
land). Austen, 1909, ‘Illustr. African Blood-Suck. Flies,’ p. 109, Pl. IX, fig. 66 (¢). 
Tabanus tarsalis C. F. Adams, 1905, Kansas Univ. Sci. Bull., III, p. 151 ( ¢; Salisbury, Southern 
Rhodesia). 
BELGIAN Conco. — Elisabethville (Mich. Bequaert). lLufira River (J. 
Rodhain). Mid-Lualaba; Kambove to Lukafu; mid-Lufira; Bunkeya to Kam- 
bove; Mfungwa (Sampwe) to Kayumba; Kambove (8. A. Neave). Kasununu 
River. 
The dorsal stripes of the thorax may be much more distinct than in Austen’s 
figure, while the median triangular spots of the abdomen are often smaller. 
T. nyasae is an East and Central African species, known from the Katanga, 
Northern Rhodesia, Southern Rhodesia, Nyasaland, and Portuguese East Africa. 
There is also a record from Northern Nigeria (Simpson, 1912, Bull. Ent. Res., 
II, p. 346), but I doubt whether it was based upon a correct identification. As 
for the specimens listed as 7’. tarsalis by Newstead, Dutton and Todd (1907, 
Ann. Trop. Med. Paras., I, p. 45, Pl. IV, fig. 13), they were made the types of 
T. disjunctus Ricardo (see under 7’. ustus). 
Tabanus fraternus Macquart 
Tabanus fraternus Macquart, 1845, ‘Dipt. Exot.,’ Suppl. I, p. 31 (9; Caffraria). Austen, 1909 
‘Tllustr. African Blood-Suck. Flies,’ p. 101, Pl. VIII, fig. 58 ( ¢). ; 
Tabanus bipartitus Walker, 1856, ‘Insecta Saundersiana,’ I, Dipt., p. 451 ( ?; Port Natal). 
Tabanus trisignatus Loew, 1858, Ofvers. Vet. Ak. Férhandl., Stockholm, XIV, (1857), p. 340 
(9; Caffraria). 
