INTRODUCTION lxxxvii 



173. Alouatta ululata. Maranhao, Lower Amazon, Brazil. 



174. Alouatta villosus. Guatemala, and Honduras. 



175. Alouatta beelzebul. Para to Rio Madeira, Lower Amazon, 



Brazil. 



176. Alouatta palliata. Nicaragua; Costa Rica; Panama; Central 



America. 



177. Alouatta p. mexicana. State of Vera Cruz, Mexico. 



178. Alouatta p. coibensis. Coiba Island, west coast of Panama. 



179. Alouatta ^equatorialis. West coast of Ecuador. 



180. Alouatta ursina. Venezuela; Bahia to Province of Espirito 



Santo, Brazil ; Peru. 



181. Alouatta seniculus. Colombia; and forests between Rio 



Negro and Rio Solimoens ; Rio Madeira. 



182. Alouatta macconnelli. Coast of Demarara, English and 



French Guianas ; Cayenne to coast north of the Amazon. 



183. Alouatta insulanus. Island of Trinidad. 



184. Alouatta juara. Rio Juara, Upper Amazon. 



185. Alouatta sara. Province of Sara, Bolivia. 



Pithecia. 

 Range of the Genus. 

 Neotropical Region. 

 Range of the Species. 



186. Pithecia monacha. North bank of the Upper Amazon from 



Tonantins extending into Peru, Ecuador. 



187. Pithecia capillimentosa. Cayenne. 



188. Pithecia albicans. Tonantins to Peru; on the Solimoens 



River, Brazil. 



189. Pithecia pithecia. English and French Guianas; and region 



of the Rio Negro and Rio Branco. 



190. Pithecia chrysocephala. Near Barra, Rio Negro, Brazil. 



Range unknown. 



191. Pithecia albinasa. Santarem, Lower Amazon, Brazil. 



192. Pithecia satanas. British Guiana ; forests near Para, Lower 



Amazon ; banks of the Rio Orinoco ; Rio Tocantins and 

 Rio Negro, Brazil. 



193. Pithecia chiropotes. British Guiana; Upper Orinoco; Rio 



Negro and Rio Branco, Brazil ; banks of the Rio Japura, 

 Peru. 



