142 LLOYDS NATURAL HISTORY. 



V. THE RED-BELLIED TAMARTN. MIDAS RUFIVENTER. 



Midas rufive?ife7% 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 elegantiilus^ Slack, Proc. Acad. Nat. Sc. Philad., 1861, 

 p. 463. 



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

 260 rpart\ 



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 inystax^ 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- 

 ventef\ by the want of the ashy tips to the hairs of the back 



