525 



it's size, and it's yellow feet. The female re- 

 mains all her life of a dull dusky brown colour, 

 with yellow only on the under wing-coverts and 

 tips of the wings *. To preserve in our collec- 

 tions the fine tint of the plumage of a male and 

 full-grown rock manakin, it must not be exposed 

 to the light. This tint grows pale more easily 

 than in the other genera of the passerine order. 

 The young males., as in most other birds, have 

 the plumage or livery of their mother. I am 

 surprised to see, that so excellent an observer as 

 Mr. Le Vailla&t-f can doubt, whether the females 

 in fact always remain of a dusky olive tint. The 

 Indians of the Raudales all assured me, that 

 they had never seen a saffron-coloured female. 



Among the monkeys, that the Indians had 

 brought to the fair of Pararuma, we distin- 

 guished several varieties of the $ai%, belonging 

 to the little groups of creeping monkeys called 

 matchi in the Spanish colonies ; marimondes §, 

 or ateles with a red belly ; litis, and viuditas. 

 The last two species particularly attracted our 

 attention, and we purchased them to send to 



* Especially the part which ornithologists call the carpus. 

 f Oiseaux de Paradis, vol. ii, p. 61. 



I Simia capucina, capuchin monkey. See my Observ. de 

 Zoologie, vol. i, p. 323 — 325, 336, and 355, on the confusion 

 that prevails in the nomenclature of the sai and the neigh- 

 bouring species. 



| Simia bclzebuth. 



