Tropical fruit-eating bats of the genus _Artibeus_ reach their northern limits on the lowlands of the eastern and western coasts of Mexico. Recent students have placed the species of Mexican _Artibeus_ in two groups; one includes bats of small size and one includes bats of large size (Dalquest, 1953:61; Lukens and Davis, 1957:6; and Davis, 1958:163). Three of the small species (_A. cinereus phaeotis_, _A. aztecus_, and _A. turpis nanus_) and three of the large species (_A. hirsutus_, _A. jamaicensis jamaicensis_, and _A. lituratus palmarum_) have been reported as far north as Jalisco along the west coast. _A. cinereus phaeotis_ and _A. turpis nanus_ are known from as far north as southern Si…
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