688 MR. R. I. POCOCK A REVISION OF [Jiiue 18, 



head is black. Oheek-liairs usually speckled .erey and lilack, 

 i-irely black, and contrasted with the dai-ker often jet-black 

 colour of the top of the head and nape. Forearm jet-black 

 outside, dark inside, the two surfaces gradually blending in tint ; 

 the black of the upper arm frequently continued from shoulder 

 to shoulder. UpiDei- surface and sides of body almost always 

 uniformly speckled greyish yellow and black, the pale annuli in 

 the hairs rarely with a rufous tinge. Tail the same colour above 

 as below, speckled pi-oximall}^, darker, usually quite black distally. 

 Hind legs black externally or weakly speckled ; dark grey in- 

 ternally. Chin and throat grey or white, paler than the chest 

 and belly, Avhich are black or dark grey and almost always darker 

 than the sides of the body. Rarely the whole ventral area red. 



Distr. Basin of the Congo; S. Abyssinia; Lake Mweru. 



The species of this section differ from those of the Albogularis- 

 section in the absence of the red or yellow tint from the fur of 

 the dorsal area, the predominance of the black pigment in the 

 hairs of the head, shoidders, hind legs, and belly. In C. stuhl- 

 manni the belly is scarcely darker than in some of the forms of 

 the Albogularis-section, and the hairs of the hind legs, though 

 nearly black, ai^e annul ated. The head and shoulders, howevei-, 

 are jet-black. In C. ojnsthostictus, on the contrary, the head and 

 nape much resemble those of C. moloneyi, but the belly and 

 hind legs are black. 



This group is also unmistakably nearly allied to the Nictitans- 

 group, through such a form as 0. leiijcampyx boutourlimi ; and 

 also, I believe, though less closely, to the K^eglectus-group. 



The material of this group that I have seen is insufficient to 

 establish with certainty the rank that should be assigned to the 

 various foi'ms below recognised. Provisionally I refer them to 

 three species, namely C. letocamjyi/x, C. opisthostictus, and C. 

 kandti ; and divide C. leticampyx into a considerable number of 

 subspecies. Some of the lattei- may, however, prove to be worthy 

 of specific status, or to be merely based upon individual vai-iations 

 dependent perhaps on age ; while, on the contrary, forms inter- 

 mediate between C. ojnsthostictios and C. leiicamijyx or between 

 C. kandti and C. leiicampyx may prove that C opisthostictus and 

 C. kandti are but svibspecies of the earliest described species of the 

 group. 



The chai"acters of the three fibove-mentioned forms, I'egai-ded 

 as species, may be tabulated as follows : — 



a. Lower surface, inside of liind legs, and of fore legs at base 



red ; some red close to and upon the base of the tail Jcandti. 



a'. Above-mentioned areas not red. 



b. Summit of head and nape of neck thickly speckled with 

 grey and mucli less markedly darker than the sides of 

 the neck and cheeks ; black and pale anniili in the hairs 



on the bod}' subequal in width opisthosticttis. 



h'. Summit of head and nape not thickly speckled with grey 

 and therefore much darker than the sides of the neck 

 and cheeks, when the latter are speckled ; pale annuli on 

 hairs of body much narrower than the black Iei(ccniipj/x. 



