tHE GtJENONS. 6j 



Cercopithecus ruher^ Riipp., Neue Wirb. Saugeth., p. 8 (1835) ; 



Martin, Mammif. An., p. 509 (1841) (in part). 

 Le Nisnas^ F. Cuvier, Hist. Nat. Mamm., i., pi. 27 (1830). 

 Chlorocebus ruber^ Gray, Cat. Monkeys Brit. Mus., p. 25 (1870). 

 Characters. — Of the same size as C. patas, and very similar to 

 it. Fur above, and on the lower part of the limbs rufous, and 

 on the lower part of the back, and under side of the tail, much 

 darker rufous than elsewhere ; nose white, not black as in the 

 preceding species ; shoulders and external aspect of arms rufous 

 like the rest of the body, and not grey as in C. patas. 



Distribution. — North-east Africa : Kordofan and Darfur, to a 

 height of 3,000 feet above the sea. A specimen living in the 

 Zoological Gardens in 1882 was stated to have come from 

 Somali-land. 



Allied to the Patas and the Nisnas is Peters' Guenon {Cerco- 

 pithecus ochraceus, Peters, Reis. Mossamb. Saugeth., p. 2, pi. 

 I a), from Querimba, Mozambique, which has the upper side 

 yellowish, and is probably but a variety of C. pyrrhonotus. 



XXI. THE REDDISH-GREEN GUENON. CERCOPITHECUS 

 RUFO-VIRIDIS. 



Cercopithecus rufo-viridts, Geoffr., C. R., xv., p. 1038 (1842); 

 id. Diet. Hist. Nat., iii., p. 307(1849); Schl., Mus. Pays- 

 Bas, vii., p. 78 (1876) ; Scl., P. Z. S., 1893, p. 258. 



Chlorocebus ricfo-viridisy Gray, Cat. Monkeys Brit. Mus., p. 25 

 (1870). 



? Cercopithecus flavidus^ Peters, Reis. Mossamb., p. 3, pi. i.b. 



Characters. — Face black; a large frontal band white; head 

 above olive-green; back green washed with rufous, gradually be- 

 coming bright rufous, slightly speckled with black on the sides 

 3 -V. 2 F 



