10 PRIMATES. 
watercourse. Most of the troop consisted of Cebus hypoleucus; but with them were 
several Ateles, of one of which Mr. Salvin wrote the following description as it sat 
jabbering at him and throwing down sticks from a branch about twenty feet above his 
head :—‘“ The whole body was a light-greyish drab all over, except the hands, knees, 
elbows, and feet, which were black; the face was black, with the exception of the 
flesh-coloured mouth; the upper part of the tail was slightly tinged with buff, as was 
also the top of the head. On the middle of the forehead was a small triangular patch 
of erect black hairs. There were several others just like the specimen described. 
These animals were evidently of the form described as A. melanochir.” It is not 
unusual, Mr. Salvin informs me, to see Monkeys kept in confinement in the court- 
yards of the Spanish houses in Guatemala. Amongst them may occasionally be seen 
individuals of this southern species; but, on inquiry, he has always found that such 
specimens had been brought either from Nicaragua or Costa Rica. 
4. Ateles vellerosus. 
Ateles frontatus (?), Sclater, Nat. Hist. Rev. 1861, p. 509 (nec Gray)’. 
Ateles vellerosus, Gray, P. Z. 8. 1865, p. 733 (descr. orig.)’; Cat. Monk. &c. Brit. Mus. p. 44°; 
Sclater, P. Z. 8. 1872, pp. 5, 798, pl. iit; Reinhardt, P. Z.S. 1872, p. 797°; Vidensk. 
Meddelelser, 1872, p. 150°. 
Ateles fuliginosus, Schlegel, Mus. Pays-Bas, iii. p. 179 (nec Kuhl ?)’. 
Ateles pan, Schlegel, op. cit. p. 180 (1876, descr. orig.)*. 
Hab. Mexico, Alvarado (Deppe, Mus. Berol.1), Chiapas, Vera Cruz, San Luis Potosi 
(Sallé1), Mirador, Oaxaca (Liebmann, Mus. Hafn.°*), Acapulco? (Boucard *) ; 
GuATEMALA, Vera Paz*, Volcan de Atitlan, Pacific Coast (Salvin, Mus. Brit.), 
Coban (Mus. Lugd.)'. 
The Mexican Spider-Monkey was referred by Mr. Sclater* to Gray’s A. vellerosus, 
which was originally described from a specimen in the British Museum labelled (certainly 
erroneously) as being from Brazil’; and a comparison of Central-American specimens 
with Gray’s type leaves no doubt as to their identity. Professor Schlegel united both with 
Kuhl’s A. fuliginosus’; but the description of that species *, though far from diagnostic, 
seems to me to apply better to the dull grey varieties of A. geoffroyi. At the same time 
Professor Schlegel separated the Spider-Monkeys of Mexico and Guatemala, and gave 
the name of A. pan to the latter °. 
After a careful examination of the specimens in the British, Leyden, Berlin, and 
Copenhagen Museums, I am convinced that all the Ateles hitherto obtained from 
Mexico and Guatemala are referable to one somewhat variable species, distinct from 
A. geoffroyt though closely allied, for which A. vellerosus is the earliest name that can 
be used with certainty. The most constant character by which they may be separated 
* Beitr. z. Zool. &c. p. 25 (1820, descr. orig.). 
