_Callithrix moloch_, Geoffr., Arch. Museum, iv., p. 33, pl. 3(1844), id., Ann. Mus., xix., p. 114 (1812); Gray, Cat. Monkeys Brit. Mus., p. 55 (1870). CHARACTERS.--Differs from the Reed Titi in having the cheeks, chest, and belly red. Hands and feet of the same colour as the back, grey. The cerebral convolutions of this animal are, according to M. C. Dareste, exactly those of a "Maki," or _Lemur_. DISTRIBUTION.--Throughout Brazil. VI. THE ORNATE TITI. CALLITHRIX ORNATA. _Callithrix discolor_, Verreaux, M.S. (nec Geoffr.). _Callithrix ornata_, Gray, Ann. and Mag. Nat. Hist., xvii., p. 57 (1866). _Callithrix ornatus_, Gray, Cat. Monkeys Brit. Mus., p. 55 (1870). {163}CHARACTERS.--General colour black and grey, grizzled; forehead 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 Bogotá. HABITS.--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, pl. 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. {164}DISTRIBUTION.--Upper Amazon. Of all the species of the genus, this ranges furthest to the south--to 14° S. lat. VIII. THE BLACK-FRONTED TITI. CALLITHRIX NIGRIFRONS. _Callithrix nigrifrons_, Spix, Sim. et Vespert. Bras., p. 21, pl. 15 (1823); Gray, Cat. Monkeys Brit. Mus., p. 56 (1870); Schl., Mus. Pays Bas, vii., p. 232 (1876). CHARACTERS.--Nearly allied to the Masked Titi (_C. personata_), but distinguished by the nearly white back of the head and nape of the neck, and by the hairs at the base of the tail being entirely red. DISTRIBUTION.--Upper Amazonia. IX. THE RED-BELLIED TITI. CALLITHRIX CASTANEIVENTRIS.