52 Lloyd's natural history. 



usually the case in the genus ; no beard ; tail long, thinly- 

 haired, tapering. 



General colour all over, black, speckled with white or yellow- 

 ish, the hairs being grey at their roots, then black, tipped with 

 white or yellowish-white; face purplish-black; nose-spot pure 

 white j no white on the lips ; ears black ; no black stripes on 

 the face, a character distinguishing it from all the other spotted- 

 nosed Monkeys ; under surface of body and basal part of tail 

 blackish-grey, the inside of the limbs less distinctly so. 



Some specimens are not so black, but are greyer, especially 

 on the under side, which may be washed with brown. 



The white colour of the nose not extending on to the upper 

 lip distinguishes this species from C. petaurista^ independently 

 of the general colouring. 



Distribution. — West Africa. Although the "Hocheur" is not 

 uncommon in European menageries, it is still uncertain in 

 exactly what part of that extensive region it has its home. 



Habits. — Nothing is known of the habits of this species, 

 except what has been observed from examples living in cap- 

 tivity. In durance the species is mild and gentle in disposi- 

 tion, and very active, and has a way of incessantly shaking its 

 head, a habit from which it derives its French appellation of 

 '' Hocheur." 



XI. THE RED-EARED GUENON. CERCOPITHECUS ERYTHROTIS. 



Cercopithecus erythrotis, Waterh., P. Z. S., 1838, p. 59; 1841, 

 p. 71 ; Martin, Mammif. An., p. 535 (1841); Fraser, Zool. 

 Typ., pi. iv. (1848); Wagn., in Schreb. Saugeth. SuppL, 

 v., p. 49 (1855) ; Gray, P. Z. S., 1868, p. 182; id., Cat. 

 Monkeys Brit. Mus., p, 21 (1870); Schlegel, Mus. Pays- 

 Bas, vii., p. 70 (1876) ; Scl., P. Z. S., 1884, p. 176, 1893, 

 p. 246. 



