LEONTOCEBUS 199 



Geogr. Distr. River Javari, border of Brazil and Peru, 

 (Schlegel) ; Copataza River, Ecuador. 



Genl. Char. Fur ringed, and washed with rufous. Tail very long. 



Color. A narrow line on forehead above eyes black ; top and sides 

 of head, nape and mantle, blackish chestnut speckled with reddish 

 brown ; lips and face beneath eyes, white ; shoulders, arms, throat and 

 chest, reddish brown speckled with black; back, rump and sides, 

 mottled black and buff ; hind limbs reddish brown, base of hairs black ; 

 under parts reddish chestnut ; hands and feet black ; tail at base reddish 

 brown, remainder black, with reddish brown hairs mingled with the 

 black. Ex type Paris Museum. 



Measurements. Total length, 620 ; tail, 330. 



This species in certain ways resembles L. nigricollis Spix, but 

 does not have the head entirely black like that species, the black being 

 confined to the forehead. There are other differences in the coloration 

 of portions of the body, which influence me to keep the two forms 

 apart, although it is not impossible that eventually they may be proved 

 to be the same species. The type has no locality, but Schlegel states 

 that the specimen in the Leyden Museum was obtained on the Rio 

 Javari, and Thomas received six examples from the Rio Copataza in 

 Ecuador. 



Leontocebus nigricollis (Spix). 



Midas nigricollis Spix, Simiae et Vespert. Bras., 1823, p. 28, pi. 



XXI; Slack, Proc. Acad. Nat. Scien. Phil., 1861, p. 464; 



Reichenb., Vollstand. Naturg. Affen, 1862, p. 12, fig. 42; 



Forbes, Handb. Primates, I, 1894, p. 145. 

 Leontocebus ater Less., Spec. Mamm., 1840, p. 205. 

 Midas rufoniger I. Geoff, et Dev., Compt. Rend., XXVII, 1848, 



p. 499; I. Geoff., Cat. Primates, 1851, p. 64; Casteln., Exped. 



Amer. Sud, Mamm., 1855, pi. V, fig. 3 ; Dahlb., Stud. Zool. 



Fam. Reg. Anim. Natur., fasc. I, 1856, p. 195 ; Reichenb., 



Vollstand. Naturg. Affen, 1862, p. 12, no fig.; Bates, Nat. 



Amaz., II, 1863, p. 323 ; Gray, Cat. Monkeys, Lemurs and 



Fruit-eating Bats, Brit. Mus., 1870, p. 67, var. a. 

 Hapale nigricollis Wagn., Schreb., Saugth. Suppl., V, 1855, p. 132 ; 



Schleg., Mus. Pays-Bas, Simiae, 1876, p. 264. 



BLACK AND RED TAMARIN. 



Type locality. Banks of the River Solimoens. Type in Munich 

 Museum. 



