142 ALLEN'S NATURALIST'S LIBRARY. 



V. THE RED-BELLIED TAMARIN. MIDAS RUFIV ENTER. 



Midas rufiventer, Gray, Ann. and Mag. N. H., xii., p. 398 

 (1843); id. P. Z. S., 1865, p. 735; id. Cat. Monkeys 

 Brit. Mus., p. 66 (1870). 



Midas ekgantulus, Slack, Proc. Acad. Nat. Sc. Philad., 1861, 

 p. 463. 



Hapale labiata (nee Geoffr.), Schl., Mus. Pays Bas, vii., p. 

 260 (part). 



Characters. Head, throat, fore-limbs, tail, and hands deep 

 glossy black ; hairs of back, sides, and posterior limbs black, 

 broadly tipped with white, not regularly ringed ; belly, breast 

 and inner surface of limbs bright brick-red, separated by a 

 distinct line from the black of the back and outer surface of 

 the limbs. On the back of the head a small patch of the same 

 colour as the back ; on the top of the head a golden-yellow 

 triangular patch. Lips and tip of the nose, white. 



This species is distinguished from the White-lipped Tamarin 

 (M. labiatus) by the spot on the crown and nape ; and by the 

 rufous of the under side extending forward nearer to the 

 throat. 



Distribution. Banks of the Upper Amazon. Mr. Bates shot 

 a specimen at Tunantins in 69 W. long., and 4 S. lat. 



Habits. Nothing is known of the habits of this species. 



Closely allied to the Red-bellied Tamarin is the so-called 

 MOUST ACHED TAMARIN (Midas tnystax, Spix), in which the head, 

 shoulders, and tail are black ; the body above brown, some- 

 times ringed with white, and the belly bright rust-coloured. It 

 can be distinguished, as Dr. Slack points out, from M. rufi- 

 venter, by the want of the ashy tips to the hairs of the back 



