254 C ALLICEBU S 



CAELICEBUS NIGRIERONS (Spix). 



Callithrix nigrifrons Spix, Sim. et Vespert. Bras., 1823, p. 15, pi. 

 XV; Wagn., Abhand. Akad. Munch., V, 1848, p. 447; Id. 

 Schreb., Saugth. Suppl., V, 1855, p. 110; Reichenb., Voll- 

 stand. Naturg. Affen, 1862, p. 121, fig. 56; Schleg., Mus. 

 Pays-Bas, Simiae, 1876, p. 232 ; Gray, Cat. Monkeys, Lemurs 

 and Fruit-eating Bats, Brit. Mus., 1870, p. 56; von Pelz., 

 Brasil. Saugeth., 1883, p. 19; Forbes, Handb. Primates, I, 

 1894, p. 164. 



BLACK-FRONTED TITI MONKEY. 



Type locality. Province of Minas Geraes, Brazil. Type in Munich 

 Museum. 



Geogr. Distr. From Province of Minas Geraes to that of Rio 

 de Janeiro, where the species meets with C. personatus. 



Genl. Char. Forehead and stripe to ears black, but in some 

 examples the stripe is wanting; throat grayish, not black. 



Color. Face naked, black ; forehead with a black stripe to ears ; 

 hands black; feet reddish brown, toes black; top of head and neck 

 buff, hairs with a subterminal black ring ; hairs on upper parts of body 

 pale orange ochraceous with a subterminal black ring ; forearms black, 

 the pale orange rufous of base of hairs showing through ; arms from 

 shoulders to elbows like back; hinder parts and inner side of limbs 

 buff; tail tawny, hairs blackish towards tips. Ex type Munich 

 Museum. 



Measurements. Total length, 960 ; tail, 455 ; foot, 100. Ex type 

 Munich Museum. 



The above description taken from Spix's type will hardly answer 

 for the figure on Spix's plate, which does not represent the species, nor 

 agree with his description. The various descriptions in Spix's volume, 

 should have the chief attention, and species be determined by them, for 

 not a few of his figures are quite unlike the types, (making all allow- 

 ance for the lapse of time and possible discoloration of the specimens), 

 and would certainly mislead an investigator trying to determine his 

 material. There is a certain amount of variation in coloring existing 

 among examples of this species, and some do not have the black stripe 

 on forehead to reach the ears, and the apical half of the tail is much 

 lighter, being at times cream buff. 



Callicebus gigot (Spix). 



Callithrix gigot Spix, Simiar. et Vespert. Bras., 1823, p. 22, pi. 

 XVI; I. Geoff., Cat. Primates, 1851, p. 40; Wagn.. Schreb.. 



