THE TAMARINS. 143 



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 

 (M. pilealus, 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 weddellii, Deville, Rev. et Mag. de Zool., 1849, p. 55. 



Midas devillii, Is. Geoffr., Cat. Me'th. Primates, p. 64 (1851); 

 Castelnau, Exped. Ame'r. Sud, Mamm., pi. vi., fig. 2 

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



Midas leucogenys, Gray, P. Z. S., 1865, p. 735 ; id. Cat. 

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



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



Hapale weddelh. 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. Castelnau and Deville, at 

 Sarayacu, in the Peruvian Amazons. 



VII. THE BLACK-FRONTED TAMARIN. MIDAS NIGRIFRONS. 



Midas nigrifrons, Geoffr., Cat. Me'th. Primates, p. 64 (1851). 

 Midas flavifrons, var. c. Midas nigrifrons, Gray, Cat. Monkeys 



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

 Hapale nigrifrons, Schl., Mus. Pays Bas, vii., p. 263 (1876). 



