ATELES. 733 
tail beneath distally, naked; fur not woolly; middle incisors long, 
broad; molars small, rounded. 
IIA INO) 1st MeOH). 
A. Limbs and tail long, body slender. 
a. Upper parts black. PAGE 
a. j-Under parks Stayish wihtite..<./0) 232.064 202 A. vellerosus 733 
DywUnder parts rusty reds <2. .1...65.55 Ee PA LeOTTOpL 2723 
ce.) Under parts deep fulvous.. 2. ....-25 52.8 A. rufiventris 734 
nm OMGEr DATES WIE sic. J. elo a, ke on he eR ae A. ater 734 
b. Upper parts grizzled black and silvery gray, 
USCS MAGES OKA VISE ciara sate! NE Gets Ae A. grisescens 734 
684. vellerosus (Aiteles), Gray, Proc. Zoél. Soc., 1865, p. 733 
fuliginosus Schleg., Mus. Pays-Bas., 11, 1876, p. 179. (nec 
Kuhl.) 
pan Schleg., Mus. Pays-Bas., 111, 1876, p. 180. 
MEXICAN SPIDER MONKEY. 
Type locality. Unknown. 
Geogr. 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. Totallength, 1310; tail vertebra, 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. Zodl., 1820, p. 26. 
melanochitr Desm., Mamm., 1820, p. 76. 
jrontatus Gray, Ann. Mag. Nat. Hist., rst 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. 
albtfrons Gray, Cat. Monkeys, etc., Brit. Mus., 1870, p. 44. 
variegatus Frantzius, in Weigm., Arch. f. Naturg., xxxv, I, p. 
257. (nec 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 
