220 MR. E. BARTLETT ON PERUVIAN MONKEYS. [Feb. 21, 



as the last-named species ; in fact it may be regarded as rather rare. 

 I obtained specimens of it at Cashiboya on the Ucayali, and Santa 

 Cruz on the Huallaga. 



7. Nyctipithecus oseryi*, Is. Geoffr. et Dev. 



I found this species on the Ucayali and Huallaga rivers. It is 

 generally distributed on the Peruvian Amazons, but is by no means 

 common. It is quite nocturnal, coming out in search of food only 

 after dark, and is consequently difficult to obtain. 



My specimen is from Yurimaguas on the Huallaga. 



8. Pithecia monachus, Geoffr. 



This Monkey is but rarely met with on the Peruvian Amazons. 

 I obtained an adult male, female, and young at Chamicuros, an inland 

 town on the Huallaga. These were the only three I met with 

 myself; but I saw others in possession of the Indians. 



9. Hapale pygm^ea (Spix). Pigmy Marmoset. 



This pretty little Monkey is extremely rare and difficult to obtain. 

 I shot only one specimen at Santa Cruz, on the Huallaga river, the 

 only locality in which I have met with it. 



10. Midas devilliiI, Is. Geoffr. (Plate XIII.) 



This is the only species of Midas met with by me in Eastern Peru. 

 It is plentiful everywhere on the Peruvian Amazons ; and I obtained 

 specimens both on the Huallaga and Ucayali. The sexes hardly 

 differ, the male being merely rather larger and darker, especially on 

 the head and nape, where the hair is longer. 



This species is extremely delicate and will not bear the least cold. 

 I have had them alive for two or three weeks ; but they appear to 

 suffer from cold and die. They are kept, however, by the Indian 

 women, who make pets of them, and put them into the long hair on 

 their heads ; with this protection they are able to live for a long 

 time. Having become tame, they frequently hop out and feed, or 

 having captured a spider or two scamper back again and hide under 

 the luxuriant crop of their owners, who are generally unwilling to 

 part with them. 



* [Mr. Bartlett's skins of Nyctipithecus are, in rny opinion, certainly referable 

 to N. oseryi. But I have little doubt that this is the same as N. vociferans of 

 Spix obtained at Tabatinga. 



Wagner (Siiugeth. v. p. 108) refers N. vociferans of Spix to N. lemurinus of 

 Columbia, which can hardly be right geographically. — P. L. S.] 



t [Three skins of a Midas in Mr. Bartlett's collection are certainly referable to 

 this rare species, of which MM. Castehiau and Deville obtained two specimens 

 only at Sarayasu. 



Their figure (Castelnau, Exp. Mamm. t. 6. fig. 2) not being very accurate, and 

 having been taken, as is stated, from imperfect specimens, the figure herewith 

 given (Plate XIII.) will be acceptable.— P. L. S.] 



