ITURI YELLOW-BACKED DUIKER 147 



{Notes Leyde?i Museum, vol. xxviii. p. 117, 1906) described a male 

 example of the same type from north-west Rhodesia as a new species 

 under the above name. 



This specimen, which is rather smaller than a female of CepJialoplius 

 sylvicultor from Liberia, is described as differing from that species in 

 the following respects : — 



The horns are shorter and the hoofs more slender ; while the 

 general colour is decidedly distinct, and the light triangle on the back 

 somewhat larger. Moreover, the buttocks are coloured like the triangle 

 and not like the flanks, as in sylvicultor, while there is no black band 

 separating the triangle from the rump-patch. 



Dr. Jentink believes that the specimen figured in pi. xiv. fig. 2 

 of the Book of Antelopes as a young male of the typical C. sylvicultor 

 is an adult of the eastern representative of the group, which, as 

 suggested above, may be nothing more than a local race of the western 

 animal. 



ITURI YELLOW-BACKED DUIKER 



{Cephalophus iturietisis) 



In the Comptes Rendus of the Paris Academy of Sciences for 1907 

 Baron Maurice de Rothschild and Mr. H. Neuville described a yellow- 

 backed duiker from the Ituri Forest, East Central Africa, as nearly 

 allied to Cephalophus coxi, but, in their opinion, entitled to rank as a 

 distinct species for which the name C. ituriensis was proposed. 



The colouring is stated to be duller than that of coxi, and shows 

 a tendency in many parts. to a yellowish-black tinge, in place of one 

 of greyish yellow or grey. The yellowish black passes on the cheeks 

 and chin into a clear grey like that of coxi ; but in some parts the 

 tint darkens nearly to black. The forehead, for instance, is almost 

 black, in place of chestnut, the same being the case on the back of the 

 neck. On the other hand, the crest of hair on the vertex of the head 

 is chestnut, with only a slight mixture of black. The shoulders, which 

 are covered with short dark hair, grade in colour from the dark of the 

 nape to the brown of the ill-defined dorsal triangle, which is narrow,, 

 and imperfectly separated from the light area corresponding to the 

 rump-patch of coxi. In the triangle the hairs are blond with blackish- 

 brown tips, while in the rum.p-patch they are black with whitish tips. 



If C. coxi be regarded as a race of C. sylvicultor, the same course 

 will have to be followed in the case of the Ituri duiker. 



