52 SIMIID^. 



allied forms. For example, in a neighbouring group, tlie black-faced stump-tailed 

 monkeys, M. ocreatus and M. maurus. Dr. Sclater^ states that it is hardly possible 

 to distinguish the one from the other. 



*Macacus leoninus, Blyth. 



Macacus nemestrimis (?) Blyth, Journ, As. Soc. Beng. 1844, vol. xiii, p. 473. 



Innuus arctoides (?) Blyth, Journ. As. Soc. Beng. 1847, vol. xvi. p. 731. 



Macacus leoninus, Blyth, Cat. Mamm. Mus. As. Soc. Beng-. 1863, p. 7 ; Journ. As. Soc. Beng. 1875, 



vol. xliv. ex. no. p. 6 ; Sclater, Proc. Zool. Soc. 1870, p. 663, pi. xxxv (male and female). 

 Cercopithecus , Heifer, Journ. As. Soc. Beng. vol. vii. 1838, p. 858. 

 Macacus andamanensis , Bartlett, Land and Water, July 24, 1869, vol. viii. p. 57 ; Sclater, Proc. Zool. 



Soc. 1869, p. 467 et fig. (female); Hamilton, Proc. Zool. Soc. 1870, p. 220. 

 Innuus leoninus, Blyth, Journ. As. Soc. Beng. vol. xliv. 1875, ex. no. p. 2. 



A thick-set powerful animal, with a broad, rather flattened head above, and a 

 moderately short, well-clad, upturned tail, about one-third the length of the body and 

 head. The female considerably smaller. 



In the male, on the shoulders, the back of the neck, and on the upper part of 

 the humerus, the hairs are long and annulated with orange and black, so that these 

 portions of the animal are more brightly coloured than the others on which annulation 

 also prevails. On the former localities the hairs measure fully three inches in length 

 and their basal halves are greyish, and the remainder annulated with eleven alternate 

 bands of dark brown and orange, the apical ring being of the former colour. Behind 

 the shoulder the hair is shorter, especially on the rump. On the middle line of the 

 back the terminal dark brown ends of the hairs change into black and increase in 

 extent, and as they are traced backwards the last halves of the hairs become wholly 

 black and the yellow annuli disappear ; so that on the lumbar and upper surface of 

 the sacral region, the exposed portion of the fur is black, and this colour is pro- 

 longed on to the upper surface of the tail. On the sides of the body anterior to the 

 blackish area occupying the loins, the hair is annulated, but more or less black- 

 tipped. The orange-olive of the shoulder pales on the lower two-thirds of the 

 fore-limb into a yellowish olive; but all the hairs are annulated. On the out- 

 side of the thighs also and on the sides of the sacral region the hair is annulated ; 

 but on the latter area the annuli are rather obscure, and the colour is greyish, 

 more or less washed with black ; the thighs partaking of the annulation and colour 

 of the arms, but paler, and with a more dusky tinge. The upper sides of the hands 

 are somewhat dusky, but the feet are more so. The buttocks, even to the sides of 

 the tail, are sparsely clad with grey fur wanting annulations ; and the tail on its under 

 surface is pale grey, except towards its end, where the black of the upper surface 

 extends downwards and has a rusty tinge. The tail is somewhat tufted. The hair on 

 the chest is annulated, but paler than on the shoulders, and it is especially dense on 

 the lower part of the chest. The lower half of the insides of the anterior and pos- 



1 Proc. Zool. Soc. 1871, p. 223. 



