936 REPORT OF THE HARVARD AFRICAN EXPEDITION 
Brueran Coneo. — Between the Lufupa and Lubudi rivers (S. A. Neave). 
Panda River, October 1920; Elisabethville, December 1920 (Mich. Bequaert). 
This interesting small species is fairly common in Upper Katanga, North- 
ern Rhodesia, Nyasaland, and the southwestern part of Tanganyika Territory. 
It has also been recorded from Bihé and Benguela. Its distribution would 
seem to cover the ‘Rhodesian (or Angolan) Highland District’”’ of the East- 
and-South African Subregion, as delimited by J. P. Chapin (1923, American 
Naturalist, LVI, p, 121, fig. 11). 
Through the kindness of Dr. H. Schouteden, I have before me one of the 
cotypes of 7’. nitidus, a female labelled ‘‘ Kiambi et Memba Kunda”’ (correctly 
‘““Niemba Kunda,”’ a locality on the Luvua River, upstream from Kiambi). A 
careful study of this tabanid has convinced me that it is a badly preserved 
specimen of 7’. coniformis. It was evidently kept in alcohol, which explains 
the relatively small (shrivelled) size, the absence of all pilosity, the shiny ap- 
pearance, and the lack of the abdominal gray markings which, moreover, are 
faint and readily worn off in 7. coniformis. This specimen shows once more 
the futility of describing new species of Tabanidae upon alcoholic material. 
Tabanus gedoelsti Surcouf 
Tabanus gedoelstt Surcouf, 1911, Rev. Zool. Afric., I, p. 32 (9; Katanga). 
BELGIAN Coneo.— La Panda, August and September 1920; Kasepa 
River near Elisabethville, September 1923; Kimilolo River near Elisabeth- 
ville, October 1923. Several females and three males (Mich. Bequaert). 
Thus far this species was known only from the two types. The long series 
which I have seen from Katanga indicate that it is a valid species, closely allied 
to T. coniformis Ricardo. The female differs from that of coniformis in the 
less conical abdomen, the apical segments of which are not conspicuously dark- 
ened, in the pale yellowish stigma and veins of the wings, in the broader basal 
portion of the third antennal segment, and in the pale reddish femora which 
on the middle and hind legs are hardly darker than the tibiae. Length, 12 
to 15 mm. 
Male (undescribed). — Length of body, 12 to 13 mm.; width of head, 4 to 4.5 mm.; length of 
wing, 10 mm. 
Shows'the usual sexual differences of the group, the abdomen being blotched with dark brown 
or black near the base of the tergites, toward the middle line and the sides, while the median and 
lateral markings of whitish pilosity are even fainter than in the female. The entire body is 
covered with a peculiar cinereous, frosty bloom (also present in the female). One male has the 
dorsum of the thorax mostly pale reddish brown, while in the other two males the thorax is uni- 
formly black. (This variation occurs also in the female sex). Legs almost entirely pale reddish 
brown; the apex of the fore tibiae and the fore tarsi black; the coxae and femora sometimes 
darkened (in one male almost black). Fore tibiae much more slender than in the female. Anten- 
nae mostly yellowish red, darker toward the tip; the basal portion of the third segment more 
slender than in the female. Eyes holoptic, hemispherical, enlarged but variable in size; the zone 
of larger facets occupying nearly the upper three-quarters of the eye and only narrowly separated 
from the occipital margin. 
Three specimens from Kasepa River near Elisabethville (allotype in the Congo Museum at 
Tervueren). 
