﻿400 ERNEST E. AUSTEN— NEW AFRICAN TABANIDAE — PART III. 



Head : front above supra-antennal patches o£ black hair clothed with yellowish 

 hair ; upper surface of face smoke-grey pollinose ; sides of face, except orbits 

 which are yellowish-grey pollinose, greyish dark brown, without shining calli, 

 a patch of black hair mixed with yellowish hairs below each antenna, close to 

 groove at base of facial prolongation ; jowls, basi-occipital region, and 

 occiput whitish-grey pollinose, jowls and basi-occipital region thickly clothed 

 with whitish hair ; palpi dark brown (terminal joint reddish-brown), under 

 side of proximal joint, except distal third, with long whitish hairs, which are 

 more numerous at base ; first and second joints of antennae greyish clove-brown, 

 clothed above with blackish hairs, third joint dark chestnut or dark reddish- 

 brown, distal extremity dark brown. Thorax : dorsum with a pair of narrow, 

 light grey, longitudinal stripes, commencing on front margin, where they broaden 

 out slightly, and enclosing rather more than median third ; a little beyond the 

 transverse suture the narrow grey stripes become indistinct, but each sends out 

 an offshoot along the portion of the transverse suture with which it is in contact, 

 and this offshoot bifurcates at its outer extremity, passing forwards and back- 

 wards along outer border of dorsum; portions of dorsum immediately behind and 

 in front of transverse suture on each side, and enclosed between narrow grey 

 longitudinal stripe and its offshoot just described, clove-brown, darker than 

 remainder of dorsum ; inner margins of narrow grey longitudinal stripes bordered 

 with olive-brown, and a broader but less sharply defined longitudinal stripe of 

 same colour in centre of dorsum ; hairy covering of dorsum yellowish and silky, 

 sparsely mixed with blackish hairs on main portion of dorsum, a small patch of 

 black hair behind each humeral callus ; above base of each wing is a fringe of 

 closely-set whitish hair ; outer surface of each postalar callus fringed with 

 similar but longer hair, upper surface of postalar calli clothed with black hair ; 

 pleurae and pectus grey pollinose, densely clothed with whitish hair, which is 

 visible in front of wings when insect is viewed from above. Abdomen : tergite of 

 first segment with a slate-grey median blotch, as wide as scutellum at base but 

 narrowing towards hind margin, which it only reaches in centre, its posterior 

 angles being rounded off ; tergite of second segment with a rounded, clove-brown, 

 median spot at base, in contact with front margin ; distally the spot is prolonged 

 towards the hind margin of the second tergite by an irregularly mottled, wider, 

 dusky patch (but the posterior fourth of the segment is entirely free from dark 

 markings of any kind), the dark median blotch formed by the basal spot and its 

 prolongation looking like an ill-defined truncate triangle, with forwardly directed 

 apex ; tergite of third segment with an ill-defined dark median blotch similar to 

 that on second segment, but extending from front to hind margin, and with a less 

 distinct clove-brown spot or nucleus at base ; on second, third, and fourth tergites 

 the median dark blotch in each case is overlaid by an ill-defined grey pollinose 

 triangle (most distinct when insect is viewed at a low angle from behind), with 

 forwardly-directed apex ; fifth and following tergites entirely greyish pollinose, 

 except in case of fifth tergite, on which a transversely elongate streak of ground 

 colour is exposed on each side, next base ; lateral clove-brown spots larger and 

 more transversely elongate on third than on second tergite, nearer front than hind 

 margins, but not actually in contact with front margin in either case ; tergite of 

 first segment with its posterior angles clothed with outstanding ochreous hair, and 



