UAKARI MONKEYS. ,8i 



ftice \\';is pale and mottled, the glowiug scarlet hue not superveniui;- in these animals 

 before mature age ; it had also a few long black hairs on the eyebi'ows and lips. 

 The frisky little fellow had been reared in the house amongst the children, and 

 allowed to run about freely, and take its meals with the rest of the household. 



" The uakari is one of tlie many species of animals which are classified by the 

 Brazilians as mortal, or of delicate constitution, in contradistinction to tho.se whicli 

 are dura, or hardy. A large proportion of the .specimens sent from Ega die before 

 arriving at Para, and scarcely one in a dozen succeeds in reaching Rio Janeiro 

 alive. The difficulty it has of accommodating itself to changed conditions probably 

 has some connection with the very limited range, or confined .sj^here of life, of the 

 species in its natural .state, its native homo being an area of swampy woods, not 

 more than about sixty .s(juare miles in extent, although no permanent barrier exists 

 to check its dispersal, except towards the south (where the Amazon Hows), over a 

 much wider space." 



Mr. Bates then goes on to i-elate how he had a captive uakari on board his 

 vessel, at the mouth of the Rio Negro, which escaped into the forest. On the day 

 after its escape it, however, reappeared, and took up its accustomed position on the 

 vessel, having evidently discovered that the forests of the Rio Negro were by no 

 means so suited to its existence as those of the delta-lands of its native Japura 

 River. Uakaris are never known to descend of their own accord to the ground, 

 the forests inhabited by them being inundated during the greater part of the year. 

 Hence the .shortness of their tails is no indication of their habits being more 

 terrestrial than those of the loujjf-tailed .sakis. 



Other Species. 



Red-Faced On the western side of the Putumaycj River the bald uakari is 



UakajL replaced by a closely allied species, known as the red-faced uakari 

 {U. ruhicanda), whicli appears to have an equally confined distributional area, 

 although the exact westei-n limits of its range are unknown. This uakari differs 

 from the preceding by the hair of the body and the limbs being of an almost 

 uniform rich deep chestnut hue, only becoming rather paler on the neck. This is 

 in marked contrast to the pale sandj' white, tending slightly to rufous, on the 

 under-parts and the inner surfaces of the limbs, characteristic of the bald-headed 

 uakari. Both species agree, however, in their brilliant scarlet faces, and in haviiig 

 hair of a rich chestnut tint beneath the throat ; and there can be no doubt but 

 that they are extremely closely related, and have acquii'ed their slight diftei-ences 

 of coloration by being now completely separated from one another, although 

 descended at no very distinct epoch from a common ancestor. 

 Black-Headed The most northerly representative of these monkeys is the 



Uakari. black - headefl uakari (l\ 'iiwhinocepludd'), which is found in the 

 forests to the north of the Rio Negro, especially on tlie Cassiquiare and the Rio 

 Branco. It thus enters the basins of both the Amazon and the Orinoco, so that it 

 has a consideraljly larger distributional urea than either of the other species, from 

 both of which it is widely different in coloration. 



The general colour is blackish, but the back and sides of the body are 



