THE SAKIS. 185 
I]. THE WHITE-HEADED SAKI. PITHECIA PITHECIA. 
Simia pithecia, Linn., Syst. Nat., i., p. 40 (1766). 
Simia leutocephala, Audeb. Singes., Fam. vi., Sect. i, p. 9, 
fig. 2 (1797). 
Pithecia adusta, Wlig., Abh. Berl. Ak., 1804-1811, p. 107; 
Kuhl, Beitr. Zool., p. 44 (1820). 
Pithecia nocturna, Wlig., 1. c.; Schl., Mus. Pays Bas, vu.., p. 217 
(1876 ; part). 
Pithecia leucocephala, Geoffr., Ann. du Mus., xix., p. 117 (18%2) ; 
Gray, Voy. Sulphur, Zgol., p: 12, pl. 25. id., ‘Cat. Mon- 
keys Brit: Mus., p. 59 (1870 ;‘part) ; Scl, PZ. 5., 1671, 
Pp. 229. 
Pithecta ochrocephala, Kuhl, Beitr. Zool., p. 44 (1820, = young). 
FPithecia rufibarbata, Kuhl, t.c. p. 44 (1820). 
Pithecia capillamentosa, Spix, Sim. et Vespert. Bras., p. 16, 
plea (7323). 
Pithecia rufiventer, Geoffr., Cat. Méth. Primates, p. 55 (1851) ; 
Gray, Cat. Monkeys Brit. Mus., p. 60 (part, 1870); Wagner, 
Abhandl. Akad. Miinch., v:, pt. 2, p. 436 (1848: = 9). 
Lithecia chrysocephala, Geoffr., Cat. Méth. Primates, p. 55 
(1851). 
Pithecia pogonias, Gray, Voy. Sulphur, p. 13, pl. 2 (1844). 
Characters.—Male.—Hair black, very long over the body, and 
especially on the tail. Head with short hair, white, washed with 
yellow and divided by a central nude black streak ; the white 
hair becoming yellow on the cheeks. 
Female-—Greyish-black, washed with pale yellow, the hairs 
being tipped with the latter colour ; moustache yellow ; belly 
red. 
Young Male. — Belly rufous brown. 
