COLOBUS 123 
Semnopithecus olivaceus Wagn., Schreb., Saugth. Suppl., I, 1840, 
p. 309. 
Colobus cristatus Gray, Ann. Mag. Nat. Hist., XVII, 3rd Sér., 
1866, p. 77; Id. Proc. Zool. Soc. Lond., 1868, p. 182, pl. XV; 
Id. Cat. Monkeys, Lemurs and Fruit-eating Bats, Brit. Mus., 
1870, pp. 19, 128. 
Procolobus verus Rochebr., Faun. Sénégamb., Suppl. Vert., 1887, 
p. 97, pl. I. 
VAN 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). 
Subgenus Tropicolobus. 
Ears tufted; upper parts and legs not black. 
CoLOBUS RUFOMITRATUS Peters. ; 
Colobus rufomitratus Peters, Monatsb. K. Preuss. Akad. Berlin, 
1879, pls. IA, II; Forbes, Handb. Primates, IT, 1894, p. 88. 
Tropicolobus rufomitratus Rochebr., Faun. Sénégamb., Suppl. 
Vert., 1887, p. 120. 
