COLO BUS 123 



Semnopithecus olivaceus Wagn., Schreb., Saugth. Suppl., I, 1840, 



p. 309. 

 Colobus cristatus Gray, Ann. Mag. Nat. Hist., XVII, 3rd Ser., 



1866, p. 77 ; Id. Proc. Zool. Soc. Lond., 1868, p. 182, pi. XV ; 



Id. Cat. Monkeys, Lemurs and Fruit-eating Bats, Brit. Mus., 



1870, pp. 19, 128. 

 Procolobus vertis Rochebr., Faun. Senegamb., Suppl. Vert., 1887, 



p. 97, pi. I. 



y^N BENEDEN-S GUEREZA. 



Type locality. "L'Afrique." 



Geogr. Distr. Forests of Fantee and Ashantee; Liberia, (Butti- 

 kofer) ; West Africa. 



Color. Head with median reddish olive crest ; tips of hairs black ; 

 narrow band on forehead, sides of face and jaws pale yellow ; neck and 

 back olive brown ringed with black ; nape, and around callosities tinged 

 with reddish; sides of head and throat dirty gray; shoulders greenish 

 gray ; arms and thighs olive brown annulated with black ; hands and 

 feet dark reddish brown ; under parts ashy gray ; tail reddish brown 

 at base, rest olive brown. 



Measurements. Skull: occipito-nasal length, 80; Hensel, 58; 

 zygomatic width, 68 ; intertemporal width, 37 ; median length of nasals, 

 18 ; length of upper molar series, 22 ; length of mandible, 61 ; length 

 of lower molar series, 29. Ex specimen Paris Museum. 



The type of Colobus cristatus Gray, is in the Collection of the 

 British Museum. The specimen is mounted, and the skull having been 

 removed, showed it to be a fully adult animal. The hairy crest, 

 however, was not fully developed, but in coloring the example 

 agrees with the present species, and it is doubtless the same, a con- 

 clusion that Gray himself arrived at, (vide Cat Monk. Lemurs, etc., 

 App., p. 128). 



Subgfenus Tropicolobus. 

 Ears tufted; upper parts and legs not black. 



Colobus rufomitratus Peters. 



Colobus rufomitratus Peters, Monatsb. K. Preuss. Akad. Berlin, 

 1879, pis. lA, II ; Forbes, Handb. Primates, II, 1894, p. 88. 



Tropicolobus rufomitratus Rochebr., Faun. Senegamb., Suppl. 

 Vert., 1887, p. 120. 



