198 LEONTOCEBUS 



Genl. Char. Similar to L. mystax ; hairs of back and limbs with 

 chestnut buff tips. 



Color. Line on forehead, sides of the head, hands, feet and tail 

 jet black; edges of lips covered with long white hairs; forehead, top 

 of head, and nape extending to ears, dark ferruginous; between 

 shoulders and flanks, brownish black, hairs tipped with chestnut buff, 

 (white in type) ; arms above and beneath brownish black, uniform ; 

 back black, hairs broadly tipped with ochraceous buff, (white in type) ; 

 thighs and legs Vandyke brown, darkest on outer edge ; under parts of 

 body blackish brown ; ears black ; tail black. Ex type Paris Museum. 

 The type is possibly a little darker than specimens of this species 

 generally are, but the pale color, such as chestnut buff seen in fresh 

 specimens, has faded to white on the back, between the shoulders and 

 on flanks. Otherwise it still represents the species. 



Leontocebus thomasi (Goeldi). 



Midas thomasi Goeldi, Proc. Zool. Soc. Lond., 1907, I, p. 89. 



Type locality. Tunantins, Upper Amazon. Type in British 

 Museum. 



Genl. Char. Colors somber, belly orange. 



Color. Head, outer side of arms, chin, throat, and upper part of 

 breast, hands, feet, ears and tail, black ; neck and upper part of back, 

 burnt umber, rest of upper parts and legs blackish brown marked with 

 gray ; inner side of arms and lower part of breast, buff yellow ; rest of 

 under parts dark orange. Ex type British Museum. 



Measurements. Similar in size to L. labiatus. 



Leontocebus nigrifbons (I. Geoffroy). 



Midas nigrifrons I. Geoff., Compt. Rend., XXXI, 1850, p. 875; 



Id. Cat. Primates, 1851, p. 64; Id. Archiv. Mus. Paris, p. 



572 ; Dahlb., Stud. Zool. Fam. Reg. Anim. Nat., f asc. I, 1856, 



pp. 192, 196; Gray, Cat. Monkeys, Lemurs and Fruit-eating 



Bats, Brit. Mus., 1870, p. 67, var. e ; Thos., Proc. Zool. Soc. 



Lond., 1880, p. 395. 

 Hapale nigrifrons Wagn., Schreb., Saugth. Suppl., V, 1855, p. 



135 ; Schleg., Mus. Pays-Bas, Simiae, 1876, p. 263. 

 Midas nigrifrons Reichenb., Vollstand. Naturg. Affen, 1862, p. 



13, no fig. ; Forbes, Handb. Primates, I, 1894, p. 143. 



BLACK-FRONTED TAMARIN. 



Type locality. Not given. Type in Paris Museum. 



