The two individuals here reported fit fairly well the description of color pattern given for the species by Van Gelder (_op. cit._: 379), but are larger (considering sex), externally and cranially, than any of the four specimens reported previously. Measurements of the male and female are, respectively: total length, 291, 270; length of tail, 65, 58; length of hind foot, 38, 35; length of ear from notch, 25, 23; weight in grams, 247.0, 190.5; condylobasal length, 46.0, 42.9; occipitonasal length, 45.0, 41.4; zygomatic breadth, 29.0, 27.3; mastoid breadth, 23.9, 22.5; interorbital constriction, 14.3, 13.6; postorbital constriction, 14.8, 14.1; palatilar length, 15.6, 14.6; postpalatal length, 23.2, 22.4; cranial depth, 16.6, 15.2; length of maxillary tooth-row, 14.2, 13.4. Cranial measurements were taken in the manner described by Van Gelder (_op. cit._: 236-237). LITERATURE CITED ANDERSEN, K. 1908. A monograph of the Chiropteran genera _Uroderma_, _Enchistenes_, and _Artibeus_. Proc. Zool. Soc. London, pp. 204-319, illustrated, September. ANDERSON, S. 1956. Extension of known ranges of Mexican bats. Univ. Kansas Publ., Mus. Nat. Hist., 9:347-351, August 15. 1960. Neotropical bats from western México. Univ. Kansas Publ., Mus. Nat. Hist., 14:1-8, October 24. BAILEY, V. 1915. Revision of the pocket gophers of the genus Thomomys. N. Amer. Fauna, 39:1-126, 8 pls., 10 figs., November 15. BAKER, R. H., and A. A. ALCORN 1953. Shrews from Michoacán, México, found in barn owl pellets. Jour. Mamm., 34:116, February 9. BURT, W. H. 1938. Faunal relationships and geographic distribution of mammals in Sonora, Mexico. Misc. Publ. Mus. Zool., Univ. Michigan, 39:1-77, 26 maps, February 15. BURT, W. H., and R. A. STIRTON 1961. The mammals of El Salvador. Misc. Publ. Mus. Zool., Univ. Michigan, 117:1-69, 1 fig., September 22. COMMISSARIS, L. R. 1960. Morphological and ecological differentiation of _Peromyscus merriami_ from southern Arizona. Journ. Mamm., 41:305-310, 2 figs., August 15. COUES, E. 1877. Precursory notes on American insectivorous mammals, with descriptions of new species. Bull. U. S. Geol. Surv. Territories, 3:631-653, May 15. DALQUEST, W. W. 1953. Mexican bats of the genus Artibeus. Proc. Biol. Soc. Washington, 66:61-65, August 10. DAVIS, W. B. 1958. Review of the Mexican bats of the Artibeus "cinereus" complex. Proc. Biol. Soc. Washington, 71:163-166, 1 fig., December 31. DOBSON, G. E. 1890. A monograph of the Insectivora, systematic and anatomical. Part III (includes only plates XXIII-XXVIII), Gurney and Jackson, London, May. GOODWIN, G. G. 1960. The status of _Vespertilio auripendulus_ Shaw, 1800, and _Molossus ater_ Geoffroy, 1805. Amer. Mus. Novit, 1994:1-6, 1 fig., March 8.