32 ATELEUS 



Province of Jean de Bracamorros, Peru, (Humboldt) ; Sierra de Cocoi, 

 Upper Rio Negro, (Natterer) ; Upper Cauca River, a southern tribu- 

 tary of the Orinoco, Venezuela, (Gordon) ; Oyapock, (Sclater). 



Genl. Char. Hair on head long, directed forward over the 

 forehead; beneath and behind cheeks similar long haprs directed for- 

 ward; face naked. 



Color. Male. Face black; top of head and neck, upper parts, 

 hands, feet, and outer side of arms and legs black; band across fore- 

 head rufous, bordered by a narrow black line ; whiskers from temples 

 to angle of mouth, white ; inner side of arms and legs, and under parts, 

 orange yellow ; tail above black, beneath, orange. 



Female. Like the male on upper parts, but the white stripe on 

 face is very narrow; many black hairs on the outer side of thighs; 

 inner side of arms, legs below the knees, and entire under parts 

 grayish yellow ; under side of tail pale buff yellow. 



Measurements. Skull : total length, 124 ; occipito-nasal length, 

 108; Hensel, 89; intertemporal width, 52; zygomatic width, 76; 

 palatal length, 32; breadth of braincase, 66; median length of nasals, 

 17; length of upper molar series, 24; length of mandible, 78; length 

 of lower molar series, 30. 



This species was first mentioned by Humboldt, (1. c.) as Le Chuva 

 de Bracamorros, and was afterward called by him Ateles ( !) mar- 

 ginatus, a name given by E. Geoffroy St. Hilaire to quite another 

 species. Wagner, (1. c.) bestowed upon the species the name A. 

 VARiEGATUS which it now bears, but Schlegel refused to accept this 

 name and restored that of Humboldt's 'Le Chuva,' a merely local 

 appellation, which Humboldt clearly showed he never intended should 

 be considered a scientific name, by adopting for it afterward, as he 

 supposed, Geoffroy's name as stated above. A. variegatus is readily 

 recognized by the orange yellow of the under parts, and the rufous 

 band on the forehead. The female has paler under parts than the 

 male, grayish yellow. Slack (1. c.) describes the male of this species 

 as A. GEOFFROYi, quitc a different animal, but his female is A. 



GEOFFROYI. 



Mr. E. Bartlett, (1. c.) in his account of this species says, "on my 

 arrival in Peru in 1865, Mr. Hauxwell told me of the existence of a 

 large species of Ateles ( !) which he had killed but failed to preserve. 

 He told me that he met with it on the Rio Tigri a small tributary that 

 runs into the Amazon about four miles above the town of Nauta, on 

 the northwestern shore of the Peruvian Amazon. He said that during 



