Calomys sorellus (Thomas, 1900) . Ann. Mag. Nat. Hist., ser. 7, 6:297.

TYPE LOCALITY: Peru, Libertad Dept., 8 mi S Huamachuco, 3500 m .

DISTRIBUTION: Peruvian Andes, above 2000 m, from Dept. Libertad to Puno.

SYNONYMS: frida, miurus .

COMMENTS: Classified as a subspecies of C. lepidus (Cabrera, 1961); discrimination from and sympatry with C. lepidus documented by Hershkovitz (1962), who relegated frida and miurus to synonymy under C. sorellus (also see Pearson and Patton, 1976).