Phyllotis wolffsohni Thomas, 1902 . Ann. Mag. Nat. Hist., ser. 7, 9:131.

TYPE LOCALITY: Bolivia, Cochabamba, Tapacari, 9900 ft .

DISTRIBUTION: Upper E Andean slopes in C Bolivia.

COMMENTS: Hershkovitz (1962) synonymized wolffsohni as a subspecies of P. darwini, a relationship at variance with morphological and karyotypic information (Pearson, 1958; Pearson and Patton, 1976).