lxxiv INTRODUCTION 



quatus; Saimiri sciureus; S. cassiquiarensis ; Alouatta ursina; 

 Ateleus variegatus ; A. beelzebuth ; and Cebus apiculatus. Brazil 

 with its immense extent of territory and vast forests contains the 

 greatest proportion of the American Primates. It has two Seniocebus, 

 S. bicolor and S. martinsi ; one Cercopithecus ursulus ; nine 

 Leontocebus ; L. chrysomelas ; L. rosalia ; L. chrysopygus ; L. 

 mystax; L. nigricoixis ; L. imperator; L. nigrifrons; L. labiatus; 

 and L. thomasi. Of Callithrix, it has thirteen species : C. santarem- 



ENSIS; C. JACCHUS? C. ALBICOLLIS ; C. HUMERALIFERJ C. PENICILLATA J 



C. p. jordani; C. leucocephala ; C. argentata ; C. aurita ; C. flavi- 

 ceps; C. chrysoleuca; C. pygm^ea; and C. leucopus. Callicebus 

 is represented by three species: C. emili^e; C. torquatus; and C. 

 amictus. Aotus has five species: A. trivirgatus; A. roberti ; A. 

 infulatus; A. miriquouina; and A. vociferans. Alouatta gives 

 three species : A. beelzebul ; A. caraya ; and A. juara ; while 

 Pithecia has six: P. satanas; P. chiropotes; P. albicans; P. 

 chrysocephala ; P. albinasa ; and P. monacha. Cacajao is entirely 

 Brazilian and all its three species are found within that territory. 

 Ateleus appears to be represented by only three species: A. mar- 

 ginatus; A. variegatus; and A. paniscus. The single species of 

 Brachyteleus is a native of Brazil ; and Lagothrix has four species : 

 L. lagotricha ; L. cana ; L. ubericola ; and L. thomasi. Cebus has 

 eight species inhabiting Brazil, C. variegatus ; C. unicolor ; C. macro- 

 cephalus ; C. versuta ; C. libidinosus ; C. cirrifer ; C. caliginosus ; 

 C. azasje ; and three doubtful, their exact localities being unknown, C. 



CRASSICEPS ; C. VELLEROSUS ; and C. FRONTATUS. 



On the western side of the Continent, Colombia contains sixteen of 

 the species of Primates, one Seniocebus meticulosus ; one CEdipomidas 

 salaquiensis ; one Saimiri sciureus ; three Aotus ; A. vociferans ; A. 

 griseimembra ; and A. lanius ; one Alouatta ; A. seniculus ; four 

 Ateleus ; A. geoffroyi ; A. ater ; A. rufiventer ; and A. hybridus. 

 Lagothrix has but one species lagotricha. Cebus has four and one 

 subspecies : C. flavus ; C. chrysopus ; C. malitiosus ; C. c. nigripectus ; 

 and C. fatuellus. Ecuador, the next State, has twelve species: 

 Saimiri madeira ; and S. macrodon ; Aotus gularis ; and A. micro- 

 don ; Alouatta ^quatorialis ; Pithecia monacha ; Ateleus panis- 

 cus; Lagothrix infumata; L. lugens; and Callicebus has C. 

 cupreus ; C. p^enulatus ; and C. leucometopa. Peru has nineteen 

 species: Callicebus torquatus; C. amictus; C personatus: C. 

 cupreus ; and C. subrufus. Saimiri b. nigriceps ; and S. macrodon ; 

 four Aotus: A. trivirgatus; A. nigriceps; A. senex; and A. oseryi. 



