THE GUEREZAS. 05 



Semnopithecus bkolor, Wesmael, Bull. Acad. Sc. Brux., ii., p. 



236 (1835). 

 Colobus leucoineros^ Ogilby, P. Z. S., 1837, p. 69; Martin, 



Mammif. Anim., p. 497 (1841). 



Colobus ursinus, Temm., Esquiss. Zool. Guin., p. 21 (1853). 

 Colobus velkrosus, Is. Geoffr., Diet. H. N., iv., p. 116 (1849); 



id., Cat. Meth. Primates, p. 17 (1851); Gervais, H. N. 



Mamm., i., p. 65 (1854); Sclater, P. Z. S., i860, p. 246; 



Reichenb., Naturg. Affen, p. 87 (1862); Matschie, S.B. 



Ges. Natur. Fr. Berlin, 1892, p. 226. 

 Colobus bicolor, Gray, P. Z. S., 1868, p. 181 ; id.. Cat. Monkeys 



Brit. Mus., p. 18 (1870); Schlegel, Mus. Pays-Bas, vii., 



p. 26 (1876); Rochebr., Faun. Se'neg., Mamm., p. 24 



(1885). 



Guereza vellerosus, Truess. Consp. Mamm., p. 10. (1S79). 



Fterycolobus vellerosus^ Rochebr., op, cit.^ Suppl. Mamm., p, 

 125, pi. X. (1887). 



Characters. — Hair on the back, flanks, and loins, very long 

 and silky; the fur everywhere deep black, excepting a frontal 

 band, which coalesces with the long hair of the auricular region 

 and sides of the neck, which are white, as well as the chin, the 

 throat, a spot on each side of the buttocks, the external and pos- 

 terior aspects of the thighs, and the short-haired tail, which is 

 tufted at the tip ; the thumbs very short, but distinct, and 

 having a flat nail. Length of body, 28^ inches; of tail, 31 

 inches. 



The young are similar in coloration to the adults, but the 

 nair is not elongated 



