(). CIIKYSOi'HKlX. 63 



* Head yrizzled grey and blackish ; hairs grey or yellow, with a black 

 subterniitud rittg. 



1. Chrysothrix sciureus. The Teetee. B. M. 



Fiir grey, minutely punctated Avith black; back more or less golden- 

 washed ; outer side of forearm yellow ; tail elongate, slender, black- 

 tipped ; face whitish ; haii'S of back orange, Avith short black tips. 



Saimiri, Bvffon, H. N. xv. 1. 10. Simla sciurea, Linn. Lemur leu- 

 copus, Herm. Callithrix sciureus, Kuhl. Chrysothrix sciureus, 

 Wagner; Schreb. v. t. 9. 



Far. 1. Back grey-punctated. B. M. 



Var. 2. Back washed with golden yellow. B. M. 



Hah. Brazil. 



2. Chrysothrix ustus. The Short-tailed Teetee. B. M. 



Fur grey, minutely punctulated with black ; back golden-washed ; 

 hairs of the back pale reddish yellow, with minute black tips ; outer 

 side of forearms like the rest of the body ; tail short, thick, black- 

 tipped ; face whitish. 



Var. 1. Outer side of the forearm golden. 



Saimiris ustus, /. Geoff. Ann. du Mus. iv. t. ? Chrysothrix nigrovit- 

 tatus, Wagner ; Schreb. v. t. 11. 



Var. 2. Outer side of the forearm coloured like the rest of the 

 body. B. M. 



Hub. Brazil. 



Dr. Dahlbom gives as the characters of this species, from the Paris 

 specimen, that the ears are nearly bald, or only slightly hairy. Our 

 specimen with the grey fore legs has the ears hairy, just like the 

 specimen of G. sciureus. If it were not for the shortness of the tail, 

 I should consider this to be only a large variety of C. sciureus. 



* * Head black ; hairs yellow, icith black tijjs. 



3. Chrysothrix entomophagns. The BJach-headed Teetee. B. M. 



Fur golden brown ; hairs of back black, with long yellow tips ; 

 outer side of thighs and shoulders closely punctated with black ; 

 upper part, head, and tail black ; face, throat, and inside of thighs 

 yello-w-ish grey ; ears hairj- ; tail moderately long. 



Callitlirix entomophafrus, D'Orh. To//. Amer. M. t. 4. Saimiris en- 

 tomophagns. Is. Geoff. Chrysotliri-x entomophagus, Schreb. v. 

 t. 16. 



Var. Upper part of the head yello^vish, with more or less long 

 black tips to the hairs, making the fur more or less deep black. B. M. 

 Hah. BoUvia, Bridyes. 



