LITERATURE CITED

Dixon, J. R.

1957. Geographic variation and distribution of the genus Tomodactylus in Mexico. Texas Jour. Sci., 9:379-409, December.

Duellman, W. E.

1958. A review of the frogs of the genus Syrrhophus in western Mexico. Occas. Papers Mus. Zool. Univ. Michigan, 594:1-15, June 6.

1961. The amphibians and reptiles of Michoacan, Mexico. Univ. Kansas Publ. Mus. Nat. Hist., 15:1-148, December 20.

Firschein, I. L.

1954. Definition of some little understood members of the leptodactylid genus Syrrhophus, with a description of a new species. Copeia, 1:48-58, February 19.

Gallardo, J. M.

1965. A proposito de los Leptodactylidae (Amphibia Anura). Papeis Avulsos, 17:77-87, January 30.