122 COLO BUS 



C. Upper parts, rump, and legs black. 



a. No white on mantle. 



a.' Head all black C. satanas. 



b.' Forehead and auricular region grayish white. 



a." Fur on back woolly C. ruwenzori. 



b." Fur on back not woolly. 



a!" White on thighs C. vellerosus. 



b.'" No white on thighs. 



a."" Tail all white C. polycomus. 



b."" Tail black at base grading 



into white C. sharpei. 



b. Long hairs on mantle from shoulders only, white. 



a.' No white line on forehead C. palliatus. 



b! White line on forehead C. angolensis. 



D. Upper parts black, rump white. 



a. Long white hairs from mantle and shoulders to 

 tail. 



a.' Tail, basal half black, rest white, tuft 



medium C. abyssinicus. 



b.' Tail, two thirds black, tuft white C. occidentalis. 



c! Tail, basal half gray, rest black C. poliurus. 



d! Tail, black at base, rest white, brush enor- 

 mous C. caudatus. 



e! Tail, basal half mixed gray and black, rest 



white, tuft long, thick C. gallarum. 



Subgenus Procolobus. 



Head crested. 



CoLOBus rERUs Van Beneden. 



Colobus verus Van Bened., Bull. Acad. Scien. Brux., V, 1838, p. 

 344, pi. XV ; Less., Spec. Mamm., 1840, p. 70 ; Martin, Mammif . 

 Anim., 1841, p. 503; I. Geoff., Cat. Primates, 1851, p. 17; 

 Wagn., Schreb., Saugth. Suppl., V, 1855, p. 37 ; Dahlb., Stud. 

 Zool. Fam. Reg. Anim. Nat., fasc. L 1856, p. 95 ; Reichenb., 

 Vollstand. Naturg. Affen, 1862, p. 86, figs. 190-192; Gray, 

 Proc. Zool. Soc. Lond., 1868, p. 182 ; Schleg., Mus. Pays-Bas, 

 Simiae, 1876, p. 28 ; Forbes, Handb. Primates, H, 1894, p. 87 ; 

 Pousarg., Ann. Scien. Nat., I, 8me Ser., 1896, p. 250, fig. 1 

 in text. 



