ATELES. 733 



tail beneath distally, naked; fur not woolly; middle incisors long, 

 broad; molars small, rounded. 



KEY TO THE SPECIES. 



A. Limbs and tail long, body slender. 



a. Upper parts black. PAGE 



a.' Under parts grayish white A. vellerosus 733 



b.' Under parts rusty red A. geoffroyi 733 



c.' Under parts deep fulvous A. rtifiventris 734 



d.' Under parts white A. ater 734 



b. Upper parts grizzled black and silvery gray, 



under parts grayish 4. grisescens 734 



684. vellerosus (Atclcs), Gray, Proc. Zool. Soc., 1865, p. 733. 

 fiiliginosns Schleg., Mus. Pays-Bas., in, 1876, p. 179. (nee 



Kuhl.) 



pan Schleg., Mus. Pays-Bas., in, 1876, p. 180. 

 MEXICAN SPIDER MONKEY. 



Type locality. Unknown. 



Gcogr. Distr. Volcano of Orizaba, State of Vera Cruz, south to 

 Guatemala, Central America. 



Genl. Char. Those of the genus. Fur long, spreading. 



Color. Head, limbs, hands, and feet exteriorly, and tail, black; 

 loins and sides golden brown ; under parts grayish or yellowish white. 



Measurements. Total length, 1310; tail vertebrae, 832; hind foot, 

 183. Skull: occipito-nasal length, 93; zygomatic width, 65; Hensel, 

 59; palatal length, 27; width of pterygoid fossa at hamular processes, 

 26; length of upper molar series, 23; length of mandible, 50; height 

 at condyle, 38; length of lower molar series, 26. 



685. geoffroyi (Ateles), Kuhl, Beit. Zool., 1820, p. 26. 

 melanochir Desm., Mamm., 1820, p. 76. 



frontatns Gray, Ann. Mag. Nat. Hist., ist Ser., x, 1842, p. 256. 



hybridus Gray, Cat. Monkeys, etc., Brit. Mus., 1870, p. 43. 



ornatus Gray, Cat. Monkeys, etc., Brit. Mus., 1870, p. 44. 



albifrons Gray, Cat. Monkeys, etc., Brit. Mus., 1870, p. 44. 



variegatus Frantzius, in Weigm., Arch. f. Naturg., xxxv, i, p. 



257. (nee Wagn.) 

 GEOFFROY'S SPIDER MONKEY. Mono Colorado in Costa Rica. 



Type locality. Unknown. Type specimen in Museum of Paris. 



Geogr. Distr. Nicaragua in Central America to Colombia, South 

 America. 



Color. Very variable. Light grayish drab; hands, feet, elbows, 

 and knees black; face black, mouth flesh color; patch of erect black 



