242 ALLEN’S NATURALISTS LIBRARY. 
VII. THE GRIZZLED SPIDER-MONKEY. ATELES GRISESCENS. 
Ateles grisescens, Scl. MSS.; Gray, P. Z. S., 1865, p. 7325 ad: 
Cat. Monkeys Brit. Mus., p. 42 (1870) Scl., Pi) Zoe 
1871, p. 223; Schl., Mus. Pays. Bas, vi., p. 168(1676) 
Characters——Hair of forehead elongate. Fur in general 
moderately long, black, with greyish-white hairs intermingled, 
giving it a grizzled appearance; under side of tail grey. 
Similar to A. afer and A. paniscus, but distinguished by the 
intermixture of grey hairs, and by the colour of the under side 
of the tail. Thumbs absent. 
Young Male.—Rather lighter in colour, especially on the 
under side of body ; tail black above, grey beneath. Length 
of body, 14 inches ; tail, 16 inches. 
Distribution.—The habitat of this species is not certainly 
known. Dr. Sclater considers it probable that it will turn up 
in some part of the Central American or the Colombian 
coast. 
VIII THE BROWN-HEADED SPIDER-MONKEY. ATELES FUSCICEPS. 
Ateles fusciceps, Fraser MSS. ; Gray, P. Z. 5, 1865, p. 733; 
Sclater, P. Z.S., 1872, p. 663, pl. lv. ; Gray, Cat. Monkeys 
Brit. Mus., p. 42 (1870); Schl., Mus. Pays Bas, vii., 
ps 279) (1576). 
Characters.—Fur thick. Hairs long, shining, crisp, deep 
black above, the hairs of the back with brownish tips; the 
under side of the body and inside of the limbs black ; crown 
of head deep coffee-brown. Length of body about 20 inches ; 
of the tail, 26 inches, according to the dimensions taken from 
the skin of a young animal by Dr. Sclater. Thumbs entirely 
wanting. 
