THE SPIDER-MONKEYS. 245 
the dark colour of the upper parts. Thumb entirely wanting. 
Eyes dark yellowish-grey. May be distinguished from the dark 
form of Geoffroy’s Spider-Monkey by the sharp definition of the 
colours of the upper and under sides of the body. 
Distribution—This species, also spoken of as the Mexican 
Spider-Monkey, is known to occur right across Guatemala ; it 
is by no means uncommon, Mr. Salvin says, in the forest 
country on the northern part of Vera Paz, and he also saw a 
troop at the summit of the ridge of mountains which connects 
the Volcan de Fuego with the main Cordillera, at about 8,000 
feet above the sea. 
The late Prof. Liebmann, the Danish botanist, obtained a 
specimen, according to Prof. Reinhardt, ‘“‘in the neighbour- 
hood of the small place Mirador, situated not far from the 
meio Of Orizaba, in the State of Vera Cruz. 2 2) He 
met with it also in the eastern parts of the State of Oaxaca. 
me. . -but at the same time he expressly states that He 
never met with this Aze/es, nor, indeed, with any other Monkey, 
on the Pacific slope of the Great Cordillera in Oaxaca, and that, 
as far as he could learn, Monkeys are to be found on the western 
coast only south of Tehuantepec.” This species is the only 
Spider-Monkey certainly known to range as far north as 
Mexico. According to M. Sallé, the most northern locality 
for Monkeys with which he was acquainted, was in the State 
of San-Louis Potosi, about 23° N. latitude, on the upper part 
of the basin of the Tampico river. (Ads¢on.) 
Habits The Mexican Spider-Monkey is, like the foregoing 
members of the genus, arboreal, consorting together in small 
troops, and feeding on fruits. Prof. Liebmann observed it in 
small troops in the deep barrancas, up to an elevation of 2,000 
