Marmosa canescens (J. A. Allen, 1893) . Bull. Amer. Mus. Nat. Hist., 5:235.

TYPE LOCALITY: México, Oaxaca, "Santo Domingo de Guzman, Isthmus of Tehuantepec."

DISTRIBUTION: México from S Sonora to Oaxaca, Yucatân, and Très Marias Isis.

SYNONYMS: gaumeri Osgood, 1913; insularis Merriam, 1908; oaxacae Merriam, 1897; sinaloae J. A. Allen, 1898.