ALOUATTA 263 



1908. /. A. Allen, in Bulletin of the American Museum of Natural 

 History. 

 Alouatta palliata redescribed &s A. p. metagalpa. 



1910. D. G. Elliot, in Annals and Magazine of Natural History. 



A. MACcoNNELLi; A. iNsuLANus; A. juARA ; and A. sara first 

 described. 



1911. G. Dollman, in Annals and Magazine of Natural History. 



A species of Alouatta from Miritibi, Maranhao, referred to 

 M. discolor Spix. 



1912. D. G. Elliot, in Bulletin of the American Museum of Natural 

 History, New York. 



Alouatta ululata first described. 



GEOGRAPHICAL DISTRIBUTION OF THE SPECIES AND SUBSPECIES. 



The members of the genus Alouatta are found from the State 

 of Vera Cruz, Mexico, on the north, through Central America and the 

 Island of Coiba to the Province of Corrientes, Brazil, on the south, and 

 westward to Colombia, Ecuador, Peru and Bolivia. 



Our knowledge of the ranges of the Brazilian species of this 

 genus is only partial, as it is also of the other Primates inhabiting that 

 Republic, for in the interior of that great country there are thousands 

 of miles of mountains and forests where no white man has ever pene- 

 trated, and whose faunae are quite unknown. Also, when Collectors 

 have failed to bring specimens back with them, it is at times impossible 

 to determine what are the species they refer to in their publications, 

 and errors of distribution can therefore easily be made. In Brazil, in 

 the interior, we have practically no knowledge of the animals which 

 inhabit the dense forests at any considerable distance from the rivers, 

 for explorers have penetrated, in most instances, but a few miles from 

 their banks, and how far a known species may range is, in many cases, 

 quite impossible to state. Therefore in giving the range of most of 

 the South American species of Primates, we are restricted to the 

 places where they have been obtained, or seen by reliable and com- 

 petent observers. 



To begin at the most northern point where a species of Alouatta 

 dwells, we find, in the eastern portion of the State of Vera Cruz, 

 Mexico, A. palliata mexicana, the only species of the genus inhabiting 

 that Republic. In Guatemala, Central America, A. villosus occurs, 

 extending its range into Honduras ; while in Nicaragua we have A. 

 palliata, which is also an inhabitant of Costa Rica and Panama. On 



