THE TITI MONKEYS. 163 



Characters. General colour black and grey, grizzled ; fore- 

 head and ears white, instead of black as in C. caligata, or 

 coppery-red as in C. cuprea ; temples, cheeks, throat, under 

 side of body, and inner side of legs, bright chestnut ; hands 

 and feet grey ; tail black, with a grey tinge, the hairs being 

 grey, with a dark ring near the tip of each ; hands and feet the 

 colour of the back. 



Distribution. U. S. Colombia ; vicinity of Bogota. 



HaMts. This species is arboreal, like the other members of 

 its genus, and it is said to be nocturnal. It spends the day 

 rolled up very much as many of the Lemurs do. 



VII. THE MASKED TITI. CALLITHRIX PERSONATA. 



Callithrix personatus, Geoffr., Ann. Mus., xix., p. 113 (1812) ; 



Spix, Sim. et Vespert. Bras., p. 18, pi. 12 (1823) ; Gray, 



Cat. Monkeys Brit. Mus., p. 56 (1870). 

 Callithrix brunnea, Wagner, Arch. f. Naturg., 1842, i., p. 357 



(ex Natterer, MSS.). 



Pithecia melanops, Vigors, Cat. Coll. Zool. Soc., p. 6. 

 Callithrix personata, Schl., Mus. Pays. Bas, vii., p. 231 (1876). 



Characters. Size larger than that of the other Titis. Style of 

 fur the same as in the previous species, but longer, and the 

 long stiff hairs more bristly; general colour black, mottled with 

 grey rings on the hairs; back grizzled grey; entire head, hands, 

 feet, and lower part of limbs, black ; chest, under side of the 

 body, and tail dark ashy-grey, the latter washed at the base, 

 sometimes extensively, with rufous, and grey towards the tip 

 below. 



Female. Body strongly washed with whitish-yellow, and the 

 tail with rufous ; forehead between the ears, black. 



M 2 



