Megasorex gigas (Merriam, 1897) . Proc. Biol. Soc. Washington, 11:227.

TYPE LOCALITY: Mexico, Jalisco, near San Sebastiân, mountains at Milpillas .

DISTRIBUTION: Nayarit to Oaxaca (Mexico).

COMMENTS: Formerly included in Notiosorex and still done so by Hall (1981:65); but Repenning (1967:56) and Armstrong and Jones (1972«, Mammalian Species, 16) considered Megasorex a distinct genus; a view supported by George (1986) on the basis of allozyme data.