The Amphibians and Reptiles of Michoacán, México

by William Edward Duellman

Shannon, F. A., and Humphrey, F. L.

1957. A new species of Phrynohyas from Nayarit. Herpetologica, 13:15-18, March 30.

1958. A discussion of the polytypic species, Hypopachus oxyrrhinus, with a description of a new subspecies. Herpetologica, 14:85-95, July 23.

Smith, H. M.

1938. The lizards of the torquatus group of the genus Sceloporus Wiegmann, 1828. Univ. Kansas Sci. Bull., 24:539-693, February 16.

1939. The Mexican and Central American lizards of the genus Sceloporus. Zool. ser., Field Mus. Nat. Hist., 26:1-397, July 27.

1941a. A review of the subspecies of the indigo snake (Drymarchon corais). Jour. Washington Acad. Sci., 31:466-481, November 11.

1941b. Notes on the snake genus Trimorphodon. Proc. U. S. Natl. Mus., 91:149-168, November 10.

1942a. Mexican Herpetological Miscellany. Proc. U. S. Natl. Mus., 92:349-395, November 5.

1942b. The synonymy of the garter snakes (Thamnophis), with notes on Mexican and Central American species. Zoologica, 27:97-123, October 23.