THE SQUIRREL-MONKEYS. 155 



grizzled grey, washed with golden, the tips of the hairs black ; 

 tail short, thick and grey, but with the tip black. 



Distribution. — The forests of Bolivia and Brazil. This is a 

 common species, inhabiting the whole of the Peruvian Amazons, 

 and may be met with on every stream. {E. Bartktt.) 



Habits.— Arboreal and gregarious, moving about in large num- 

 bers through the forest, feeding on insects— chiefly orthoptera 

 and spiders— small birds, and fruits. 



II. THE BLACK-HEADED SQUIRREL-MONKEY. CHRYSOTHRIX 

 ENTOMOPHAGA. 



Callithrix enfojnophagus, d'Orb., Voy. Amer. Mer., iv., Mamm. 



pi. 4 (1836). 

 Callithrix bolivie?isis, d'Orb., Nouv. Ann. Mus., iii., p. 89 



(1834). 



Saimiris entomophagus, d'Orb., Voy. Amer. Men, iv., Mamm., 



text, p. 10 (1847); Is. Geoffr., Cat. Meth. Primates, p. 



38 (1851). 

 Saimiri e?itomoJ>hagus, Schl., Mus. Pays Bas, vii., p. 246 



(1876). 

 Chrysothrix sciurea fnec L.), Frantz. in Wiegm. Arch. f. Nat., 



xxxix., p. 260 (1869). 

 Chrysothrix e?ito7nophagus, Wagn., Ann. Nat. Hist., xii.^ p. 42 



(1843) ; Gray, Cat. Monkeys Brit. Mus., p. 53 (1870). 



Characters. — Face grey, washed with yellow; ears haired; 

 head black; hairs of back black, with long yellow tips, or 

 yellow with black lips, producing a shade of brown washed 

 with golden ; outer side of upper part of arms and legs yellow, 

 peppered with black ; throat, under surface of body and inside 

 of limbs yellowish-grey ; tail long, black. 



