30 



CEBID.E. 



89. Chrysothrix cerstedi, Reinh. Red-backed Squirrel Monkey. 

 Hab. Central America. 



. Purchased, April 29, 1873. From Yeragua. See P. Z. S. 

 1873, p. 434. 



b. Female. Presented by W. F. Kelly, Esq., Sept. 5, 1874. 



From Guatemala. See P. Z. S. 1874, p. 495. 



c, d. Females. Purchased, Nov. 13, 1877. Chiriqui. 



90. Chrysothrix usta (Is. GeofFr.). Naked-eared Squirrel 



Monkey. 



Hab. Brazil. 



a. Male. Deposited, July 4, 1871. See P. Z. S. 1872. 



Genus PJTHECIA. 



91. Pithecia leucocephala (Audeb.). White-headed Saki. 

 Hab. Guiana. 



a. Male. Presented by W. H. Barton, Esq., E.M.S. Wye,' 



May 15, 1866. From the interior of Demerara. See 

 P. Z. S. 1866, p. 305, and Sclater, P. Z. S. 1871, p. 227. 

 Died June 26, 1866. Mus. Brit. 



b. Male. Purchased, Aug. 13, 1873. From Demerara Falls. 



See P. Z. S. 1873, p. 683. 



92. Pithecia monachus (Humb.). Humboldt's Saki. 

 Hab. Amazons. 



a. Female. Purchased, Oct. 14, 1862. Died Oct. 24, 1862. 



Specimen figured and described by Prof. Flower, P. Z. S. 

 1862, pi, XXXYII. p. 326. 



b. Purchased, Nov. 2, 1874. See P. Z. S. 1874, p. 664. 



c. Male. Purchased, May 20, 1877. 



93. Pithecia chiropotes (Humb.). Red-backed Saki. 

 Hab. Guiana. 



a. Purchased, Nov. 18, 1865. 



b. Purchased, Oct. 15, 1866. See P. Z. S. 1866, p. 418, and 



Sclater, P. Z. S. 1871, p. 228. 



c. Male. Purchased, Dec. 14, 1877. From Trinidad. 



