THE TITI MONKEYS. l6l 



Of these he says : "The Andoas spechnen, which is a male, differs 

 from the rest in having the fur on the back of a dirty orange- 

 grey colour, without annulalions, instead of being of a bright 

 annulated black and white. One of the others, a female, 

 shows a tendency to this condition of the hair, which is, there- 

 fore, probably a seasonal change, as the Andoan specimen was 

 shot in September, while the others were obtained between 

 December and February." 



III. THE WHITE-CHESTED TITI. CALLITHRIX AMICTA. 



Simla amicta^ Humboldt, Obs. ZooL, i., p. 357 (18 11). 

 Callithrix amicta^ Spix, Sim. et Vespert. Bras., p. 19, pi. xiii. 



(1833). 

 Callithrix amictus, Geoffr., Ann. Mus., xix., p. 114 (ioi2); 



Gray, Cat. Monkeys Brit. Mus., p. 54 (1870). 

 Calliihrix torquata^ Schl., Mus. Pays Bas, vii., p. 235 (part, 



1876). 



Characters — Agrees with the last species in the character of 

 the fur ; but the general colour is black, washed with rufous ; 

 the forehead is black ; the chest has a pure white spot; the hands 

 are white, but the feet black; the tail has the hairs entirely 

 black throughout. 



Distribution. — Guiana. 



IV. THE REED TITI. CALLITHRIX CINERASCENS. 



Callithrix cinerasce?is, Spix, Sim. et Vespert. Bras., p. 20, pi. 14 



(1823). 

 Callithrix donacophilus, d'Orb., Voy. Amer. Sud, iv., p. 10, 



pi. 5 (1826); Gray, Cat. Monkeys Brit. Mus., p. 55 (1870). 

 Callithrix do7iacophila, Geoffr., Cat. Meth. Primates, p. 41 



(1851) ; Schl, Mus. Pays Pas, vii., p. 240 (1S76). 



3 — v. T M 



