NOTES ON THE NOMENCLATURE OF CERTAIN AFRICAN TABANIDAE. 143 



femora russet (extreme tips ochraceous buff), clothed mainly with whitish or yellowish 

 white hair, antero-inferior area of front pair with minute, erect, blackish hairs ; front 

 and middle tibiae ochraceous buff, clothed with minute, glistening, yellowish or 

 ochreous hairs, hind tibiae and hind tarsi russet-brown, clothed with black hair, 

 distal extremities of hind tarsal joints blackish ; front tarsi ochraceous buff or 

 ochraceous tawny, distal extremities of last three joints dark brown, body of second 

 joint very short, tongue-like process at its distal extremity very long (longer than 

 following joint), process at end of first joint overlapping and closely applied to 

 first two-thirds of following joint ; first joint of middle tarsi cream-buff, remaining 

 joints dark brown or mummy-brown, blackish brown at tips. 



South Africa (Cape Province) : type and three para-types from Deelfontein, 

 7.xii.l902 (presented by Colonel Sloggett, A. M.S. — now Lieut. -General Sir A. T, 

 Sloggett, K.C.B., K.C.M.G.). 



This handsome species presents a decided resemblance to Corizoneura aethiopica, 

 Thunb., another inhabitant of the South African portion of the Ethiopian Region, 

 but can at once be distinguished, inter alia, by the presence of the conspicuous, 

 smoke-grey, admedian, longitudinal stripes on the dorsum of the thorax. 



Corizoneura schwetzi, sp. n. 



(J $. — Length, (J (6 specimens) 16*4 to 18 mm., $ (6 specimens) 16 to 18*6 mm. ; 

 width of head, (J just over 5 to 5'4 mm., 9 5'2 to 5'75 mm. ; distance from upper 

 margin of occiput to anterior extremity of face, (J 4*2 to 4*5 mm., $ 4*5 to 4*8 

 mm. ; width of front of $ at vertex 0*6 to 0*75 mm. ; length of proboscis, (J 15 to 

 15-25 mm., ? 11-75 to 13-75 mm. ; length of wing, (J 15 to 15*2 mm., $ 15'5 to 

 17*25 mm. 



Dusky species, with base of abdo^nen paler ; dorsum of thorax dark broivnish olive, 

 with a broad, indistinct, blackish brown longitudinal stripe along each side above lateral 

 margin, a narrow, elongate, pale spot {composed of Naples yellow or cream-buff hair) 

 above base of each wing in front of postalar callus, and a short but conspicuous stripe 

 of black hair between base of costa and humeral callus on each side ; dorsum of abdomen 

 with first two {visible) segments cinnamon-buff or tawny olive in (J, ochraceous tawny 

 in $, (J with a blackish brown median triangular spot at base of second segment, tergites 

 of third and following abdominal segments blackish brown or black, fourth segment 

 posteriorly with a conspicuous transverse band of appressed, glistening, silvery white 

 hair ; venter abruptly bicoloured, proximal portion as far as base of third {visible) 

 sternite, ivory-yellow, cream or cream-buff-coloured, remainder blackish brown ; wings 

 strongly and uniformly tinged with sepia. 



Head drab pollinose, posterior orbits paler (light greyish oUve above, smoke- 

 grey or pale smoke-grey below), shining callus on each side of face below antenna 

 black, sharply defined, sides of face below calh more or less dark brown or blackish 

 brown owing to ground-colour showing through pollinose covering, lower border 

 of sides of face in (J shining blackish brown, deeper posteriorly, distal extremity 

 of face in $ shining blackish brown, sparsely clothed with drab pollen, in both 

 sexes a more or less distinct, somewhat triangular, olive-buff or pale oHve-buff, 

 pollinose spot on each side of lower part of front, between base of antenna, margin 

 of eye and shining callus ; front in § with following series of dark brown marks— 

 (687) D 



