172 ERNEST E. AUSTEN — NEW AFRICAN HtPPOBOSCIDiE. 



from front to rear ; frontal stripe (in dried specimen) clove-brown ; face raw- 

 umber-coloured in centre, dark brown on each side below ; jowls and under 

 surface of head on each side mummy-brown, central area of imder surface 

 of head ochraceous buff; under surface of head clothed with bright, ochre- 

 yellow hair ; palpi relatively rather narrow (from above downwards) and 

 elongate, their outer surfaces dark brown or clove-brown, and clothed with 

 brownish hair ; visible portion of antennce shining dark brown, clothed with 

 black hair. Thorax : humeral calli raw-umber-coloured, dark brown behind, 

 clothed above with black mixed with ochre-yellow hairs ; portion of dorsum 

 immediately behind humeral calli, and in front of transverse suture, clothed 

 with appressed, ochre-yellow hairs ; hind margin of scutellum and portion 

 of thorax immediately in front of scutellum also clothed with ochre-yellow hairs ; 

 pleura; blackish and clothed with similarly-coloured hair ; pectus ravv-umber- 

 coloured. Abdomen clothed for most part with black hair. Wings : principal 

 veins and thicker portions of veins clove-brown or dark brown. Legs : front 

 tibia; and tarsi, and under surface of front feiTlora (in dried specimen at any rate) 

 more or less raw-umber-coloured ; under surfaces of middle and hind femora and 

 tibia; (in dried specimen) more or less mummy-brown ; legs clothed for most part 

 with black or blackish hair ; claws black. 



Uganda Protectorate: Nsadzi Island, Lake Victoria, 2.3. I. 1911, on 

 fish eagle, Haliaetus vocifcr, Daud. (Dr. H. L. Duke). 



Although closely allied to and resembling Olfcrsia {Ornitlioniyiu) intertropica. 

 Walk.,* the species described above is distinguishable by its more elongate and 

 darker palpi, by the hairs and punctures on the inner borders of the sides of the 

 front being fewer in number and coarser, and especially by the different shape of 

 the shining plate on the vertex, which is more transversely elongate, and the 

 anterior angles of which are more abruptly rounded off. 



Dr. Duke, in whose honour the species is named, states that he met with two 

 specimens of O. duhei on a fish eagle shot by him at the water's edge. The type 

 specimen was moving about under the feathers ; the other, which was not caught, 

 flew round the dead bird, settled several times on Dr. Duke, and ran under his 

 coat, but did not bite him. It flew like a Tsetse, settled abruptly, and followed 

 for some fifty yards. 



* 0. intertro2}ica, Walk., is a widely distributed species which, in the Sandwich Is. at any rate, is 

 parasitic on the short-eared owl : it has not been recorded from Africa, but, besides occurring in 

 the Sandwich Is., is also found in Mexico and Brazil. As stated elsewhere by the present writer 

 (cf. Ann. and Mag. Nat. Hist., Ser. 7, Vol. xii, p. 264, 1903), Olfemia acartu, Speiser, is 

 apparently a synonym of this species. 



