Oligoryzomys griseolus (Osgood, 1912) . Field Mus. Nat. Hist. Pubi., Zool. Ser., 10:49.

TYPE LOCALITY: Venezuela, Tachira, upper Rio Tachira, west of Paramo de Tama, 6000-7000 ft .

DISTRIBUTION: Tachira Andes of W Venezuela and Cordillera Oriental of E Colombia.

COMMENTS: As noted by Osgood (1912), this distinctive form contrasts sharply with neighboring populations of O. fulvescens (e.g., navus and tenuipes) and instead resembles O. vegetus of W Panama.