SAIMIRl 315 



Geoffrey's species as distinct, until undoubted evidence is obtained to 

 the contrary. 



Saimiei boliviensis (D'Orbigny) . 



Callithrix boliviensis D'Orbig., Nouv. Ann. Mus Hist. Nat., Paris, 

 VIII, 1834, p. 89. 



Callithrix entomophaga D'Orbigny, Voy. Amer. Merid., Mamm., 

 IV, 1836, p. 10, pi. IV. 



Callithrix sciureus var. B. Less., Spec. Mamm., 1840, p. 160. 



Saimiris entomophaga D'Orbig., Voy. Amer. Merid., Mamm., IV, 

 1847, p. 10; I. Geoff., Cat. Primates, 1851, p. 58: Casteln., 

 Exped. Amer. Sud, 1855, p. 14; Dahlb., Stud. Zool. Fam. 

 Reg. Anim. Nat., fasc. I, 1856, pp. 156, 157. 



Chrysothrix entomophaga Wagn., Schreb., Saugth. Supp]., V, 

 1855, pi. X, p. 12; Reichenb., Vollstand. Naturg. Affen, 

 1862, p. 16, fig. 47; Gray, Cat. Monkeys, Lemurs and Fruit- 

 eating Bats, Brit. Mus., 1870, p. 53; von Pelz., Kaiserl- 

 Konigl. Zool.-Botanische Gesell. Wien, XXXIII, 1883. p. 21 ; 

 Forbes, Handb. Primates, I, 1894, p. 155. 



Chrysothrix sciurea Frantz., Wiegm., Archiv. Naturg., XXXIV, 

 1869, p. 260, t. 35, (nee Linn.). 



Saimiri entomophagus Schleg., Mus. Pays-Bas, Simiae, 1876, 

 p. 246. 



BLACK-HEADED TITI MONKEY. 



Type locality. Sierras Guarayas, Bolivia. Type not in Paris 

 Museum. 



Geogr. Distr. Bolivia, and according to Schlegel, Castelnau 

 found it at Saraya(;u on the banks of the Ucayali, Peru ; but this was 

 probably S. madeir^e. 



Color. Top and sides of head and nape black ; upper parts wax 

 yellow lined with black ; arms to elbows, and legs to ankles grayish 

 yellow ; under parts and inner side of limbs straw yellow ; hands and 

 feet, saffron yellow ; tail, yellowish gray lined with black, apical por- 

 tion black. Ex type British Museum. 



Measurements. Size about same as S. sciureus. Skull : occipito- 

 nasal length, 59 : zygomatic width, 37 ; intertemporal width, 29.5 ; 

 palatal length, 16; breadth of braincase, 37; median length of nasals, 

 9; length of upper molar series, 12; length of mandible, 32: length of 

 lower molar series, 13.5. Ex type in British Museum. 



