MACACUS. 19 



A somewhat short-limbed, stout form. The hairs on the shoulders 

 and fore part of back very long, 4 to 5 inches in males, but rather 

 short on the lower back and rump. Head broad, rather flat ; hair 

 radiating in the centre of the crown and surrounded in front and 



Fig. 6. Macacus leoninus. (P. Z. S. 1870, pi. xxxv.) 



on both sides by a horseshoe-shaped crest, the anterior or supra- 

 orbital portion of which consists of very stiff hairs. Tail about 

 one third the length of the head and body, slender, well clad with 

 hair. Caudal vertebrae 17 to 18. 



The skull is distinguished from that of M. nemestrimis by having 

 the muzzle much shorter. 



Colour. Males are dark brown above, the horseshoe-shaped crest, 

 the lower back, and the upper surface of the tail black ; sides of 

 head and buttocks grey ; lower parts, including lower surface of 

 tail, light greyish brown. The tail is somewhat tufted, and has 

 sometimes a bright ferruginous tuft at the end. Females are 

 greyer and rather paler, and have no black on the head or back, 

 though the tail is blackish above. The fur is finely annulated, 

 except on the head, loins, tail, and buttocks, with yellow and 

 blackish brown above, and with dusky and whitish below. On the 

 long hair of the shoulders there are as many as ten to twelve rings, 

 five or six of each colour, on each hair. Base of hair greyish 

 brown. Face dusky flesh-colour. 



Dimension. Length of male : head and body 23 inches ; tail 

 without hair at end 8, with hair 10. Females considerably less. 

 Skull of adult male 5-3 inches long from occiput, 4 from foramen, 

 and 4 broad across the zygomatic arches ; of a female 4-45 and 3-1 

 inches long and 2-95 broad. 



