42 ATELEUS 



Genl. Char. Similar to A. belzebuth, but the yellowish white on 

 inner side of arms and legs very restricted ; no white on the cheeks. 



Color. Face black; head, shoulders, arms, hands, legs and feet, 

 black or blackish brown ; rump brown, hairs tipped with shining 

 golden ; under parts yellow ; reddish line on border of flanks ; inner side 

 of arms to elbows, and legs to ankles yellowish white; tail brownish 

 black. Ex type Leyden Museum. 



Measurements. Total length, 1,120; tail, "00; foot, 150. Skull: 

 total length, 1,022; interorbital width, 57.1 ; occipito-nasal length, 99.3; 

 Hensel, 66; zygomatic width, 63.5; median length of nasals, 15.4; 

 palatal length, 27.6; length of upper molar series, 24.3; length of 

 mandible, 60; length of lower molar series, 27.1. Ex type Leyden 

 Museum. 



The type specimen has the hair on the head radiating from point 

 on occiput and projecting in front over the face. There is a strong 

 reddish brown tint over all the back in certain lights, and also on the 

 tail, but less strong. The light stripe on inner side of arms goes to 

 elbows. 



This species is found in Mexico and Guatemala, and in the latter 

 country quite across from sea to sea. Mr. Salvin met with it in 

 Guatemala during his visits there. Once he came near a troop of these 

 monkeys on the summit of a ridge of mountains which connects the 

 Volcan de Fuego with the main cordillera, at an elevation of about 

 8,300 feet above the sea. 



"Indians always spoke of Monkeys (doubtless of this species) 

 being found in these upland forests." Alston (1. c.) states that 

 "during Mr. Salvin's last visit to Guatemala (in 1873-74) he met 

 with A. vellerosus, (A. pan), in numbers in the forests of the Volcano 

 of Atitlan. On the 22nd of January, 1874, he made an expedition from 

 the village of San Augustin with the object of ascertaining the most 

 practicable part to attempt the ascent of the mountain. On this 

 occasion he ascended to a height of 6,000 feet, and during the last 

 1,000 feet or so, saw several troops of Atcles in the tops of the 

 higher trees in the forest. One of these, the specimen in the British 

 Museum, he shot. These parties of Monkeys were usually about 

 twenty in number and of all ages. On approaching them they did not 

 evince any alarm, but kept uttering a constant querulous sort of bark, 

 and moved from time to time so as to get a better view of the intruder. 

 A few days afterwards, during an excursion to the same volcano, when 

 the summit, 11,800 feet above the sea was reached, numerous troops 



