YOUNG.--Hoary grey, darker on the belly and inner surface of the limbs; hands and top of head black. PLATE XX. [Illustration: HUMBOLDT'S WOOLLY MONKEY.] {223}DISTRIBUTION.--This Monkey was discovered by Humboldt on the Guaviaré, a branch of the Orinoco river. It occurs in the Upper Magdalena Valley, Colombia, where it is known as the "Churuco" river. Its true habitat is the district south-west of the Rio Negro towards the Andes. It is unknown in the Lower Amazon Region. HABITS.--The "Caparro," as the Orinoco Indians named this species to Humboldt, or "Macaco barrigudo," as the Portuguese settlers call it, is entirely an arboreal animal, living exclusively on fruits, on which it is a most voracious feeder. The name of "big-bellied," which _barrigudo_ means, is probably obtained from the effects of this habit. Its manners in captivity are grave, and its temper, according to Mr. Bates, is mild and confiding, like that of the Coaitas, or Spider-Monkeys. Owing to these traits, the Barrigudo is much sought after as a pet; but it is not hardy like the Coaitas, and seldom survives a passage down the river to Pará. Nevertheless, the Zoological Society has had a considerable number of these Monkeys in confinement during the past twenty years. Mr. Bates also states that it is much persecuted by the natives on account of the excellence of its flesh as food. "From information given me," he says, "by a collector of birds and mammals whom I employed, and who resided a long time among the Tacuna Indians, near Tabatinga, I calculated that one horde of this tribe, 200 in number, destroyed 1,200 of these Monkeys annually for food. The species is very numerous in the forests of the higher lands, but, owing to long persecution, it is now seldom seen in the neighbourhood of the larger villages." II. THE BROWN LAGOTHRIX. LAGOTHRIX INFUMATUS. _Gastrimargus infumatus_, Spix, Sim. et Vespert., Bras., p. 41, pl. 29 (1823). {224}_Lagothrix poeppigii_, Schinz, Synops. Mamm., i., p. 71 (1844); Pucher., Rev. et Mag de Zool., p. 299 (1857); Schl., Mus. Pays Bas, vii., p. 164 (1876). _Lagothrix geoffroyi_, Schinz, Synops. Mamm., i., p. 72 (1844). _Lagothrix castelnaui_, Is. Geoffr. et Deville, C.R., xxvii., p. 498 (1848); Casteln., Voy. Amér. Sud, Zool., p. 5, pl. 1. _Lagothrix infumatus_, Gray, Cat. Monkeys Brit. Mus., p. 46 (1870); Scl., P. Z. S., 1871, p. 219 (Note). CHARACTERS.--Large in size; face naked, black; general colour dark reddish-grey, the hairs being reddish-brown at the base, and tipped with grey or black; head, face and hind hands darker brown; chest, upper side of fore-arms, and under surface of body dark brown, or almost black; sides of body, base of the tail and perineal region brownish-red; hair of chest and under surface long and rather rigid.