178 ^h. O. Tlioiuas on new 



XXI. — Nejo Mammals from Peru and Bolivia, with a List of 

 (hose recorded from the Inamhari Rivery Upper Madre de 

 Dios. By Oldfield Thomas. 



Two fuitlier consignments luive recently been received from 

 that indetatigable and most successtul collector Mr. Perry O. 

 Simons, obtained in South-eastern Peru and the adjoining 

 parts of Bolivia. Among other places, he was able to visit 

 tiie Inambari River, whence a collection was recently sent to 

 the Kew York Museum and reported on by Dr. J. A. Allen *. 

 By adding !Mr. Simons's species and one or two of Mr. Kali- 

 nowski's to those recorded by Dr. Allen, I am able to give a 

 complete list of the mammals as yet known to inhabit the 

 district. 



To commence with, the following new species have to be 

 described : — 



Cehus fatuellus peruanus^ subsp. n. 



Like C. fatuellus, but with the " horns " scarcely deve- 

 loped, all the coronal hairs being of nearly equal lengtii and 

 standing vertically upright, with the black cap scarcely 

 reaching back on to the neck, and with the forearms of quite 

 the same colour as the body, instead of having a yellowish 

 patch on them. 



Dimensions of the tvpe (as taken by the collector) : — 



Head and body 390'millim. ; tail ^85. 



Skull : greatest length 91 ; basal length 62. 



Hab. Marcapala, Huaynapata, Inambari Valley, S.E. Peru. 



Ti^pe. Female. B.M. 0. 11. 5. 2. Collected 23rd July, 

 1897, by Mr. J. Kalinowski. Two specimens examined. 



1 have taken as representing the true C. fatuellus an ex- 

 cellent specimen in the Museum from Tolima, Colombia, that 

 being the country selected by Schlegel as the typical locality 

 i'or the species. 



In connexion with these Peruvian Cebi, it may be noted 

 that at Idma, Sta. Ana, also in the Province of Cuzco, 

 Mr. Kalinowski obtained four specimens of a Cebus which 

 entirely agrees with Gray's C. pallidus, first f said by him to 

 be the same as C. eleyans, Geoff., but later + described as a 

 species. The co-types were bleached, and the following is 

 a brief description of the fresh specimens : — 



General colour pale brown. Head-markings approxi- 



* Bull. Am. Mu8. N. H. xiii. p. 219 (1910). 



t P. Z. S. 1865, p. 82t). J Cat. Monkeys, p. 49 (1870). 



