ERNEST E. AUSTEN—NEW AFRICAN HIPPOBOSCIDA, 171 
markings, the much greater hairiness of the dorsum of the thorax, and the 
greater coarseness and outstanding character of the hair on the hind femora. 
Larva.—A larva of this species in the British Museum (Natural History), 
deposited by a Q taken by Dr. Van Someren at Mohokya, Toro, Uganda 
Protectorate, in February, 1911 (presented by the Entomological Research 
Committee), is of the usual Hippobosca-type, i.e., ovoid or flattened globular in 
shape, and cream-buff in colour, with, at the narrower (posterior) extremity, a 
very conspicuous black cap, which exhibits two prominences separated by a 
broad vertical groove. The dimensions of this specimen are :—length 4 mm., 
greatest breadth, 3°5 mm. 
Hippobosca hirsuta var. neavel, var. n. 
3 QO.—Length, ¢ (6 specimens) 6 to 6°5 mm., Q (4 specimens) 6°75 mm. 
(non-gravid) to 9 mm. (gravid) ; width of head (both sexes) 2 mm, to 2°2 mm. ; 
width of front (both sexes) just under 1 mm. to 1 mm.; length of wing, ¢ 6°75 
to 7°6 mm.,.© 7°2.to 7°75. 
Apart from being on the whole somewhat smaller in size, as indicated by the 
dimensions given above, agreeing in all essential respects except shape of median spot 
on scutellum, with typical form ; median spot on scutellum—instead of being large, 
rounded in front, and flattened behind—-small and shaped as shown in Fig. 1, 6, 
that is, more or less triangular, with apex of triangle resting on hind margin. 
Head: anterior portion of plate on vertex usually brown or brownish. 
Thorax : scutellum on each side of median spot, except basal angles, generally 
ochraceous or ochraceous-buff rather than dark brown. 
Nortu-Eastrern Ruopxrsta (Luangwa River Valley): type of g, type 
of ©, and two other ¢ ¢ from the junction of the Mpamadzi and Luangwa 
Rivers, 24. VIII. 1910; two dd, two QQ from the Upper Luangwa River, 
3. VIII. 1910; one J, one Q from the Mid Luangwa River, 12. VIII. 1910 
(S. A. Neave : presented by the Entomological Research Committee). 
The whole of these specimens were taken on Waterbucks, and there seems no 
reason to consider them as representing anything more than a variety of the 
Hippobosca infesting the same animal in Uganda, which is here regarded as the 
typical form. 
Genus OLFERSIA, Wied. 
Olfersia dukei, sp. n. 
©.—Length (1 specimen) 7 mm.; width of head 2 mm.; width of front at 
vertex 1*4 mm. ; length of wing 9°4 mm. 
General coloration black or clove-brown ; sides of front (frontal margins or para- 
frontals), plate on vertex, and dorsum of thorax (except humeral calli) shining black 
or blackish clove-brown ; abdomen, dorsal surfaces of middle and hind legs, and 
dorsal surface of front femora clove-brown ; anterior two-thirds of inner borders of 
stdes of front clothed with fairly long yellowish hair, with as usual a single longer 
black hair in front and behind ; wings sepia-coloured. 
Head: shining plate on vertex transversely elongate, anterior angles rounded 
off, length of hind margin at least two and a half times as great as depth of plate 
