THE TAMARINS. I43 



and posterior limbs, and the triangular golden spot on the 

 vertex. The hairs of this spot are golden throughout their 

 entire length, in this respect resembling another closely related 

 Upper Amazonian species, the so-called Bonneted Tamarin 

 (Af. pileatus^ Is. Geoffr.), from which it can readily be dis- 

 tinguished by the black colour of the under surface. The 

 back of the Bonneted Tamarin is also varied, black and grey, 

 the limbs and tail are blackish, and the lips white. 



VI. DEVILLE's tamarin. MIDAS WEDDELLI. 



Midas iveddellii, Deville, Rev. et Mag. de Zool., 1849, p. 55. 



Midas devillii, Is. Geoffr., Cat. Meth. Primates, p. 64 (1851); 

 Castelnau, Exped. Amer. Sud, Mamm., pi. vi., fig. 2 

 (1855); Gray, Cat. Monkeys Brit. Mus., p. 67 (1870). 



Midas kucoge?iys, Gray, P. Z. S., 1865, P- 735; id. Cat. 

 Monkeys Brit. Mus., p. 67 (1870). 



JIapak devilki, Schl, Mus. Pays Bas, vii., p. 262 (1876). 



Hapale iveddelii. Schl., t. c. p. 262. 



Characters. — Fur of back ringed with grey ; that of the head, 

 neck, and front of the fore- and hind-limbs, tail, hands, and 

 feet black ; loins, thighs, legs, and base of tail bright maroon. 



Distribution. — Obtained by MM. Casttrlnau and Deville, at 

 Sarayacu, in the Peruvian Amazons. 



VII. THE black-fronted TAMARIN. MIDAS NIGRIFRONS. 



Midas nigrifro7is, Geoffr., Cat. Meth. Primates, p. 64 (185 1). 

 Midas flavifro7is^ var. c. Midas nigrifro?is^ Gray, Cat. Monkeys 



Brit. Mus., p. 67 (1870). 

 Ilafale ni^rifrons^ Schl, Mus. Pays Bas, vii., p. 263 (1876). 



