ALOUATTA 277 



of the tail "d'un noir olivatre et ornee lateralement de deux stries 

 jaunes." A tail colored like that has not been seen thus far with a 

 species of Alouatta in any collection. Tschudi states (1. c.) that this 

 monkey is found in Peru in 11° Latitude, but I am not aware that 

 he sent any specimens to Europe. Kuhl states (1. c.) that a specimen 

 was in the Paris Museum, but this must have been a mistake. Geoffroy 

 does not mention it, and it is not there now. 



I have placed Humboldt's species among the synonyms of A. 

 ursina with a ? ; and the doubt can only be settled satisfactorily by the 

 acquisition of specimens. 



Alouatta seniculus (Linnaeus). 



Simia seniculus Linn., Syst. Nat., I, 1766, p. 37; Bodd., Elench. 



Anim., 1784, p. 61. 

 Cebus seniculus Erxl., Syst. Reg. Anim., 1777, p. 46 ; Fisch., Syn. 



Mamm, 1829, p. 42. 

 Alouatta seniculus Laceped., Mem. Tnstit., 1800, III, p. 89; Slack, 



Proc. Acad. Nat. Scien. Phil., 1863, p. 516; Forbes, Handb. 



Primates, I, 1894, p. 192, pi. XVIII. 

 Mycetes seniculus Illig., Prodr. Syst. Mamm. et Av., 1811, p. 70; 



Desm., Mamm., 1820, p. 77; Less., Spec. Mamm., 1840, p. 



117; Wagn., Schreb., Saugth. Suppl., I, 1840, p. 179; V, 1855, 



p. 68 ; Gray, Ann. Mag. Nat. Hist., XVI, 1845, p. 219 ; Id. Cat. 



Monkeys, Lemurs and Fruit-eating Bats, Brit. Mus., 1870, p. 



40; I. Geoff., Cat. Primates, 1851, p. 52; Dahlb., Stud. Zool. 



Fam. Reg. Anim. Natur., fasc. I, 1856, p. 175 ; Reichenb., 



Vollstand. Naturg. Affen, 1862, p. 163, figs. 156-157; Flow., 



Proc. Zool. Soc. Lond., 1862, p. 335 ; Sclat, Proc. Zool. Soc. 



Lond., 1863, p. 374; Schleg., Mus. Pays-Bas, Simise, 1876, p. 



156; Forbes, Proc. Zool. Soc. Lond., 1880, p. 632, (footnote). 

 Simia (Stentor) seniculus Humb., Rec. Obs. Zool., 1, 1811, (1815), 



p. 354. 

 Simia (Stentor) stramineus Humb., Rec. Obs. Zool., I, 1811, 



(1815), p. 355. 

 Stentor seniculus E. Geoff., Ann. Mus. Hist. Nat. Paris, XIX, 



1812, p. 108; Id. Corns Hist. Nat. Mamm., 1828, p. 21, 



9me Lecon. 

 Stentor stramineus E. Geoff., Ann. Mus. Hist. Nat. Paris, XIX, 



1812, p. 168. 

 Mycetes stramineus Kuhl, Beitr. Zool., 1820, p. 29 ; Desm., Mamm., 



1820, p. 78; Spix, Simiar. et Vespert. Bras., 1823, p. 35, pi. 



