Ammospermophilus insularis Nelson and Goldman, 1909 . Proc. Biol. Soc. Washington, 22:24.

TYPE LOCALITY: "Espiritu Santo Island, Lower California [= Baja California Sur], Mexico."

DISTRIBUTION: Known only from the type locality.

COMMENTS: Considered a distinct species (Hall, 1981:381); may be most closely related to A. harrisii (Mascarello and Bolles, 1980) . Reviewed by Best et al. (1990a, Mammalian Species, 364).