THE TAMARINS. 147 
XII. THE PIED TAMARIN. MIDAS BICOLOR. 
Midas bieplor, Spix, Sim. et Vespert. Bras, p. 31, pl. 24, fig. 1 
(1823). 
flapale bicolor, Wagner in Schreb., Saugeth., v., p. 135, pl. 12 
(1855); Schl., Mus. Pays Bas, vil., p. 257 (1876). 
Sentocebus bicolor, Gray, Cat. Monkeys, Brit. Mus., p. 68 
(1870). 
Characters.—Head naked in front of the ears in the adult ; 
hind-part of the head covered with long white hairs ; ears ex- 
exposed, naked ; tail not ringed, the upper side black ; nose and 
lips black ; neck, chest and arms white ; face, body, and hind- 
limbs brown; under side of tail, inner side of limbs, and 
the abdomen ferruginous. 
In the young animal, the face is rather hairy and the fore- 
head naked. (Gray.) 
Distribution. The eastern bank of the Rio Negro, a northern 
tributary of the Amazon. Mr. Bates obtained a specimen 
at Barra, where it was rather common in the forest; and, 
he adds: ‘‘ This place, a waterfall near Barra, which its citi- 
zens consider as the chief natural curiosity of their neighbour- 
hood, is classic ground to the naturalist, from having been a 
favourite spot with the celebrated travellers Spix and Martius, 
during their stay at Barra in 1820. Von Martius was so much 
impressed by its magical beauty, that he commemorated the 
visit by making a sketch of the scenery, to serve as background 
in one of the plates of his great work on the Palms.” 
Habits— Keeping together in small troops, running along 
the main boughs of the loftier trees, climbing perpendicular 
trunks, but never taking flying leaps. 
