188 PITHECUS 



only remains to be mentioned, P. fuscatus from Japan, which is found 

 in the Islands of Yakushima and Nippon to 14° North Latitude, and 

 common on the hills about Kyoto. 



KEY TO THE SPECIES. 



A. Tail nearly rudimentar>' l>^-3^ inches in length. 



a. Color dark brown or blackish above P. speciosus. 



b. Color dark reddish chocolate P. harmandi. 



c. Color red or golden red P. rufescens. 



d. Color dark brown, hairs banded with yellow 



and black P. fuscatus. 



B. Tail over Syi and under 8 inches in length. 



a. Color blackish brown tinged with chestnut P. thibetanum. 



b. Color dark gray, hairs tipped with yellowish 



brown P. vestitus. 



c. Color buff grading to brick dust red on 



rump P. sancti-johannis. 



d. Color dark orange P. lasiotis. 



e. Color bistre P. pagensis. 



C. Tail 8 inches in length but not over 12 inches. 



a. Color tawny ochraceous and black P. villosus. 



b. Color tawny olive and black grading into russet . . .P. littoralis. 



c. Color olive tinged with brown P. cyclopsis. 



d. Color uniform black above to rump P. neniestrinus. 



e. Color, upper back bright russet, lower back 



light ochraceous buff. 



o.' Large, tail 230 mm P. adustiis. 



b.' Small, tail 183 mm P. insulanus. 



f. Color reddish brown, crown mummy brown. P. andamanensis. 



g. Color brown washed with yellowish P. assamensis. 



h. Color bistre with grayish tinge, and buff 



speckled, grading to orange on lower back P. rhesus. 



i. Color speckled black and russet, rump dark 



orange rufous P. brevicandus. 



D. Tail over 12 inches but not as long as head and 



body. 



a. With beard and ruif around the face P. albibarbatus. 



b. Without beard or ruff. 



a.' Hairs on head radiating from a central 

 point. 



