Uxiv 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. nigricollis; l. imperator ; l. nigrifrons ; l. labiatus ; 

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



ENSIS; C. JACCHUS? C. ALBICOLLIS; C. HUMERALIFER ; C. PENICILLATA ; 



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

 CEPs; C. chrysoleuca; C. pygm^a; 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. azar-e ; 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 Actus ; 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 ; Actus gularis ; and A. micro- 

 don ; Alouatta ;equatorialis ; Pithecia monacha ; Ateleus panis- 

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

 CUPREUS; C. p^nulatus; 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 Actus: A. trivirgatus; A. nigriceps; A. senex; and A. cseryi. 



