928 REPORT OF THE HARVARD AFRICAN EXPEDITION 
the Belgian Congo, without definite locality, by Sureouf (1907, Bull. Mus. 
Hist. Nat. Paris, XIII, p. 212; and 1911, Rev. Zool. Afric., I, p. 23). In 1908 
(Bull. Mus. Hist. Nat. Paris, XIV, p. 222), Surcouf also states that this species 
is common at Brazzaville and at Irebu (on the French shore of the Congo)." 
I suspect that all these records were based upon misidentifications, the speci- 
mens in question being probably 7’. obscurefumatus Surcouf, which 1s extremely 
similar in coloration. The most striking difference between these two species 
is found in the color of the legs, which are entirely black in T. quadriguttatus; 
while in 7’. obscurefumatus the fore tibiae are white over the basal two-thirds. 
T. quadriguttatus differs from T. marmorosus in having the first submarginal 
and first posterior cells infuscated, while the discal cell is almost entirely clear, 
and in having the abdominal sternites narrowly margined with white. 
Tabanus aeneus Sureouf (1907, Bull. Mus. Hist. Nat. Paris, XIII, p. 265; ¢. 
Austen, 1909, ‘Illustr. African Blood-Suck. Flies,’ p. 110, Pl. EX, fig. 67; ¢), 
known only from the type specimen taken in Cameroon, although placed by 
Surcouf in his fourth group (with T. ruficrus), seems to be more closely allied 
to T. obscurefumatus. The wings are even more distinctly infuscated with paler 
blotches than in that species; but the median spots are very large on the third 
to fifth tergites and not connected with spots in the hind corners. 
Tabanus tenuipalpis Austen 
Tabanus tenuipalpis Austen, 1912, Bull. Ent. Res., IIT, p. 131, fig. 6 ( 9; Obuasi, Gold Coast). 
Liperia. — Lenga Town, three females, August 15, 1926. Du River, Camp 
No. 3, one female, August 1926. 
In life the eyes are uniformly purplish black. 
The Liberian specimens agree perfectly with Austen’s description. They 
differ from 7’. obscurefumatus in the more dark clove brown color of the body 
and legs and in the palpi being grayish-fawn-colored instead of slate gray. Is 
T. tenuipalpis much more than a paler color phase of 7’. obscurefumatus? 
T. tenuipalpis is known from Sierra Leone, Liberia, and the Gold Coast. 
Tabanus biguttatus Wiedemann 
Tabanus biguttatus Wiedemann, 1830, ‘Aussereurop. Zweifl. Insekten,’ II, p. 623 (%; Cape of 
Good Hope). Austen, 1909, ‘Illustr. African Blood-Suck. Flies,’ p. 85, Pl. VI, figs. 44 and 45 
Co). 
Tabanus cerberus Walker, 1848, ‘List Dipt. Brit. Mus.,’ I, p. 149 ( 9; South Africa). 
Tabanus noctis Walker, 1850, ‘Insecta Saundersiana,’ I, Dipt., p. 42 (7; Cape of Good Hope). 
Tabanus tripunctifer Walker, 1850, The Zoologist, VIII, Appendix, p. xev ( 2; Port Natal). 
Tabanus cilipes Macquart, 1838, ‘Dipt. Exot.,’ I, 1, p. 120 (in part; 9; Cape of Good Hope). 
BELGIAN Conao. — Boma, one female; Malela, one female. Zambi, one 
female (Neefs). Matadi, one male, June 9, 1915 (H. Lang). Uele River, two 
females (J. Rodhain). Elisabethville, one female, December 1921 (Mich. Be- 
quaert). Kasongo (Prince Albert of Belgium). Bunkeya (S. A. Neave). Kal- 
amu near Boma (Mayné). 
The male may be recognized by the dark wings with paler cinereous tips; 
1 The French Congo records are no longer listed by Surcouf in his Monograph (1909, p. 32). 
