Sciurus pyrrhinus Thomas, 1898 . Ann. Mag. Nat. Hist., ser. 7, 2: 265.

TYPE LOCALITY: Peru, Junin Dept., Vitoc, Garita del Sol .

DISTRIBUTION: Eastern slopes of the Andes of Peru.

COMMENT: Subgenus Hadrosciurus; see Cabrera, 1961:378. Allen, 1915, Bull. Am. Mus. Nat. Hist., 34:215, placed pyrrhinus in the genus Mesosciurus, some members of which (not including pyrrhinus) Moore, 1959, Bull. Am. Mus. Nat. Hist., 118:204, placed as a subgenus in the genus Syntheosciurus .