THE TITI MONKEYS. l6l 



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

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

 grey colour, without annulations, 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. CAT.LITHRIX AMICTA. 



Simla amicta, Humboldt, Obs. Zool., i., p. 357 (1811). 

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



(1833)- 

 Callithrix amictus, Geoffr., Ann. Mus., xix., p. 114 (1812); 



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

 Callilhrix 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 cinerascens, Spix, Sim. et Vespert. Bras., p. 20, pi. 14 



(1823). 

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



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

 Callithrix donacophila, Geoffr., Cat. Mdth. Primates, p. 41 



(1851) ; Schl.. Mus. Pays Bas, vii., p. 240 (1876). 

 , 3 v- i M 



