CHARACTERS.--Head naked in front of the ears in the adult; hind-part of the head covered with long white hairs; ears 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 forehead 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 citizens consider as the chief natural curiosity of their neighbourhood, 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. {148}XIII. LACÉPEDE'S TAMARIN. MIDAS MIDAS. _Simia midas_, Linn., Syst. Nat., i., p. 42 (1766). _Simia lacepedii_, Fischer, Bull. Soc. Mosc., 1806, p. 23. _Midas rufimanus_, Geoffr., Ann. Mus., xix., p. 121 (1812). _Midas ursulus_, var. Gray, Cat. Monkeys Brit. Mus., p. 68 (1870). _Hapale midas_, Schl., Mus. Pays Bas, vii., p. 266 (1876). CHARACTERS.--General colour black; hands and feet golden-yellow or bright rusty-red; ears short, haired. The young males resemble the adults. DISTRIBUTION.--Surinam. XIV. THE NEGRO TAMARIN. MIDAS URSULUS. _Midas ursulus_, Geoffr., Ann. Mus., xix., p. 121 (1812); Gray, Cat. Monkeys Brit. Mus., p. 68 (1870). _Midas tamarin_, Slack, Proc. Acad. Nat. Sc. Philad., 1861, p. 464. _Hapale ursula_, Schl., Mus. Pays Bas, vii., p. 265 (1876). CHARACTERS.--Body long, slender, covered with soft thick fur; ears large, naked; the face haired. General colour black; nose and lips black; hinder part of the body rather mottled or banded with reddish-brown or greyish-white; the hands sometimes black and sometimes yellow. Length, 9 inches; tail, 15 inches. DISTRIBUTION.--Found on the Lower Amazon, near Para. Mr. Bates says it is not met with in the Upper Amazon Region, but in its stead a closely allied species (_Midas nigricollis_), presents itself.[9]