1872.] MR. P. L. SCLATER ON AMERICAN QUADRUM ANA. 5 



We have at various times received at least a dozen living specimens 

 of this Spider Monkey. Nearly all of these, so far as I have been 

 able to ascertain, have been obtained by the West-Indian Mail Co.'s 

 steamers at Greytown, Nicaragua. 



6. Ateles vellerosus. (Plate II.) 



Mr. Salvin first informed me that a species of Ateles quite different 

 from that of the Pacific coast-region occurs in the forests of North- 

 ern Vera Paz, where it is abundant in some localities. Mr. Salvin 

 brought back from one of his expeditions a very imperfect skin of 

 this animal, which is now in the British Museum. 



Quite recently I have met with a skin of a Mexican Monkey, he- 

 longing to Mr. E. Gerrard, jun., which I have little doubt is of the 

 same species. Mr. Gerrard obtained it from M. A. Boucard, along 

 with other Mexican mammals, which M. Boucard believes were pro- 

 cured near Acapulco. I have taken this skin to the British Museum, 

 and find it undoubtedly identical with the specimen upon which Dr. 

 Gray founded his Ateles vellerosus (P. Z. S. 1865, p. 733, et Cat. 

 Monkeys, p. 44). Mr. Salvin's Guatemalan skin appears to be 

 rather more shortly haired, and is quite, or nearly altogether, black 

 above, but must, I think, be referred to the same species. 



Ateles vellerosus much resembles A. belzebuth in general colour, 

 but has much longer hairs, particularly on the forehead and sides. 

 The typical specimen of A. vellerosus is obviously young and small, 

 but agrees otherwise perfectly with the Mexican skin before men- 

 tioned, which I now exhibit, and from which the accompanying figure 

 (Plate II.) has been taken*. In my opinion two stuffed specimens 

 in the British Museum, determined as A. belzebuth (one received 

 from this Society in Dec. 1855, and the other purchased of Cross 

 in 1843) should also be referred to Ateles vellerosus. 



7. Ateles ater, F. Cuv. 



The Black -faced Spider Monkey appears to come up as far north 

 as the vicinity of Panama ; at least we have recently received several 

 living specimens of this species by the West-Indian mail-steamer, 

 which are said to have been obtained at Colon. 



On the 11th of November last we obtained from Mr. J. B. 

 Dawes, F.Z.S., a fine female example of this species, which, Mr. 

 Dawes informs me, was procured at Colon f. 



8. Mycetes villosus, Gray. 



Mr. Salvin has often spoken to me of the Black Howler of Vera 

 Cruz ; but it is only recently that I have had an opportunity of ex- 



* This specimen may be diagnosed as follows : — 



Supra niger : dorso superiore brunnescente, inferiore cum lateribus fulvis : 



corpore subtus et artubus intus albis : pilis omnibus elongatis, in fronte re- 



versis, in vertice project is : long. corp. 16, caudm 19. 



t We have likewise received living specimens of A. ater from Cartagena ; 

 so that there is no question of the occurrence of this species in the northern part 

 of the U.S. of Columbia. 



