278 ALOUATTA 



XXXI ; Reichenb., Vollstand. Naturg. Affen, 1862, p. 67, figs. 



170, 171 ; Bates, Nat. Riv. Amaz., I, 1863, p. 294. 

 Stentor chrysurus I. Geoff., Mem. Mus. Hist. Nat. Paris, XVII, 



1829, p. 166. 

 Mycetes auratus Gray, Ann. Mag. Nat. Hist., XVI, 1845. p. 220; 



Id. Cat. Monkeys, Lemurs and Fruit-eating Bats, Brit. Mus., 



1870, p. 40. 

 Mycetes laniger Gray, Ann. Mag. Nat. Hist., XVI, 1845, p. 219 ; 



Id. Cat. Monkeys, Lemurs and Fruit-eating Bats, Brit. Mus., 



1870, p. 40. 

 Mycetes chrysurus I. Geoff., Cat. Primates, 1851, p. 52; Casteln., 



Exped. Amer. Sud, Mamm., I, 1855, p. 4; Dahlb., Stud. Zool. 



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



Vollstand. Naturg. Affen, 1862, p. 65, fig. 158. 

 Alouatta seniculus rubicunda Allen, Bull. Amer. Mus. Nat. Hist., 



N. Y., 1904, p. 458. 

 Alouatta seniculus caucensis Allen, Bull. Amer. Mus. Nat. Hist., 



N. Y., 1904, p. 462. 



RED HOWLER. 



Type locality. Cartagena, Colombia. 



Geogr. Distr. Colombia, and forest between the Rio Negro and 

 Solimoens, (Spix) ; Rio Madeira, (Bates) ; Brazil. 



Genl. Char. Middle of back lighter than rest of back and limbs, 

 and varying from straw color to golden ; mammae placed occasionally 

 in the axillae. 



Color. Variations in color exist among individuals of this species 

 apparently quite independent of age, sex, or locality, the head, limbs 

 and tail varying from brownish and coppery red to a dark purplish 

 red, sometimes almost a blackish purplish red, and the tail from fer- 

 ruginous to dark purplish red ; the back is straw color, always lighter 

 than the head ; limbs and upper part of the back chestnut brown ; hands 

 and feet are always the same color as the limbs, and the under parts 

 are but sparsely covered, chiefly on the abdomen, with purplish red 

 hair. Young like the parents. 



The type of Mycetes chrysurus I. Geoffroy, in Paris Museum is 

 undoubtedly this species. 



Measurements. Skull: occipito-nasal length, 98; Hensel, 100; 

 zygomatic width, 79 ; intertemporal width, 46 ; median length of nasals, 

 22 ; length of upper molar series, 34 ; length of mandible, 95 ; length of 

 lower molar series, 41. Verteb., Cerv. 7, Dor. 14. L 5, S. 3, Caud. 27. 



