C ALLICEBUS 239 



a.' Forehead buffy yellow grading to ferru- 

 ginous C. cupreus. 



b.' Forehead blackish maroon C. caligatus. 



c' Forehead mixed black and gray C. melanochir. 



d.' Forehead grizzled ochraceous C. pcenulatus. 



c. Hairs on ears white. 



a.' Hands and feet burnt sienna, fingers 



grayish rufous C. egeria. 



b.' Hands and feet chestnut C. leucometopa. 



c' Hands and feet bright chestnut red, 



fingers and toes white C. subrufus. 



d! Hands and feet black, hairs tipped with 



white C. hoffmannsi. 



e.' Hands and feet yellowish gray. 



a." Under parts coppery red C. ornatus. 



b." Under parts rufous C. remulus. 



c." Under parts dark cinnamon rufous. C donacophilus. 



d. Hairs on ears ashy gray; under parts bright 



orange C. emilice. 



e. Hairs on ears yellowish gray. 



a.' Cheeks yellow, chest and belly pale rufous. .C. pallescens. 



b.' Cheeks, chest and belly reddish C. moloch. 



c! Cheeks, chest and belly grayish white... C. cinerascens. 

 C. Tail tawny, or cinnamon rufous. 

 a. Hairs on ears black. 



a.' Top of head grayish brown C. nigrifrons. 



b.' Top of head pale gray C. gigot. 



c! Top of head black C. personatus. 



d! Top of head yellowish brown C. brunneus. 



Callicebus TORQUATUS (Hoffmannscgg) . 



Cebus torquatus Hoffm., Mag. Ges. Nat. Freund. Berlin, X, 1807, 



p. 86. 

 Simla (Callithrix) lugens Humb., Rec. Zool. Observ., I, 1811, 



(1815), p. 357; Kuhl, Beitr. Zool., 1820, p. 39; Desm., 



Mamm., 1820, p. 87; E. Geoff., Cours Hist. Nat. Mamm., 



1828, p. 18, lOme Leqon. 

 Sintia (Callithrix) torquatus Humb., Rec. Obs. Zool., I, 1811, 



(1815), p. 357. 

 Callithrix torquatus E. GeoflF., Ann. Mus. Hist. Nat. Paris, XIX, 



1812, p. 114; Kuhl, Beitr. Zool.. 1820, p. 39; E. Geoff., Cours 



