8. NYCTiriTHECUS. 



57 



See Miriquoulna, Azara. Simia Azaroe, Humb. Zool. i. p. 359. 

 Pithecia miriquouina, Kuhl, Beitr. lied beneath, with black 

 hand. Hab. Paraguay. 



II. Fur soft, ivoolly, without any longer hairs ; hands and fed black. 



10. Callithrix melanochir. The Black-handed Teetee. 

 Crown, throat, and inside of the limbs black and grey and black 

 and testaceous mixed. 

 Var. 1. Fur less red. 

 Var. 2. Tail bright red.—/. Geoff. 



Callithrix melanochir, Fr. Max. Abbild. iv. t. (type in Mus. Paris). 

 Uab. Brazil : Bahia. 



11. Callithrix gigo. The Grey Teetee. 

 Crown nearly all black, slightly grey-dotted ; sides of the face, 

 gular band, and insido of tho limbs black. 



Callithrix gigo, Spix, Bras. p. 22, t. 1G ; Is. Geoff. 

 Var. ? Throat whitish. 



Callithrix ciueiascens, Spix, Bras. p. 20, t. 14. 

 Hob. Brazil. 



Tribe V. NYCTIPITIIECINA. 



Grinders f .£. Cutting-teeth vertical, in a regular scries with the 

 canines. Lower jaw dilated behind. Eyes large, nocturnal. Nos- 

 trils small, close together, as in the old-world monkeys. 



8. NYCTIPITHECUS. 



Eyes very large, lateral ; hair of the orbit radiating like the fea- 

 thers of a nocturnal bird. Septum of nose narrow. Ears large. 

 Claws small, weak. Spinous processes of the lumbar vertebra; acutely 

 triangular, incumbent. 



Aotus, Humboldt. Aotes, Jardine (misprint). Nocthora, F. (Javier. 



Nyctipithecus, Spix, Bras. 1823. Chirogaleus, species, Vigors and 



llorsjield. 



Nocturnal, with the habits of tho Iacchus, living on insects and 



birds. The ears of Humboldt's specimen seem to have been imperfect, 



which induced him to call it Aotus. 



I. Head with three streaks ; tail cylindrical. 



a. Erontal spot elongate, yellowish; hcad-strcaks linear, 

 elongate; fur short. No. 1. 



b. Frontal spot short, white; head-streaks short; central 

 rhombic. No. 2. 



II. Head with a round pale spot over each eye ; no head-streaks ; 

 fur long; tail bushy. 



