Sciurus alleni Nelson, 1898 . Proc. Biol. Soc. Washington, 12:147.

TYPE LOCALITY: "Monterey, Tamaulipas [= Nuevo Leon]," [Mexico] .

DISTRIBUTION: SE Coahuila through C Nuevo Leon, south through W Tamaulipas to extreme N San Luis Potosi (Mexico).

COMMENTS: Subgenus Sciurus (Hall, 1981:430) .