186 SENIOCEBUS 



Simia leonina, but not procured, occurs. In Colombia, at Cartagena 

 and Turbaco OEdipomidas gedipus is found, and on the River San 

 Jorge Seniocebus meticulosus was taken, and in Ecuador on the Rio 

 Napo L. tripartitus and L. graellsi have been obtained ; and in the 

 same State on the banks of the Rio Copataza, L. apiculatus and L. 

 illigeri are met with, the latter species possibly extending its range 

 into Colombia, (see I. Geoff., Cat Primates, p. 65). In Peru near 

 Pebas, L. pileatus was procured; and on the banks of the rivers 

 Ucayali and Huallaga, L. devillii dwells. Finally, in the Province of 

 Apolobamba, Bolivia, L. weddeli is found. In the above recapitulation 

 of the general distribution of these small monkeys, the ranges are 

 given according to the records obtained from specimens collected. 

 While some species may have a restricted habitat, others probably have 

 much more extensive ranges than those known at present. The interior 

 of Brazil, removed from the banks of its great rivers, is as yet im- 

 perfectly known, and it will not be until its vast forests and inland 

 savannas have been thoroughly penetrated and explored, that the 

 Geographical distribution of its Faunae, and the ranges of its individual 

 species can be definitely ascertained. 



KEY TO THE SPECIES. 



A. Head bald. 



a. Hairs on nape white. 



a.' Abdomen and inner side of legs orange 



rufous J>\ bicolor. 



b! Entire under parts and inner side of legs 



silvery white 5". meticulosus. 



b. Hairs on nape black 5\ martinsi. 



Seniocebus bicolor (Spix). 



Midas bicolor Spix. Sim. et Vespert. Bras., 1823, p. 30, pi. XXIV, 

 fig. 1 ; I. Geoff., Cat. Primates, 1851, p. 63 ; Slack, Proc. Acad. 

 Nat. Scien. Phila., 1861, p. 464; Bates, Natural. Riv. Amaz., 

 I, 1863, p. 344 ; Forbes, Handb. Primates, I, 1894, p. 147. 



Hapale bicolor Wagn., Schreb., Saugth. Suppl., I, 1840, p. 251; 

 V, 1855, p. 135 ; I. Geoff., in Casteln., Exped. Amer. Sud, 

 1855, p. 21 ; Dahlb., Stud. Zool. Fam. Reg. Anim. Natur., 

 fasc. I, 1856, pp. 188, 193 ; Schleg., Mus. Pays-Bas, Simiae, 

 1876, p. 257. 



