Part 4

COPE, E. D.

1900. The crocodilians, lizards and snakes of North America. Rept. U. S. Nat. Mus. for 1898, pp. 153-1270.

FITCH, H. S.

1941. Geographic variation in garter snakes of the species Thamnophis sirtalis in the Pacific Coast region of North America. Amer. Midland Nat., 26:570-592.

FOX, W.

1951. The status of the gartersnake, Thamnophis sirtalis tetrataenia. Copeia, 1951:257-267.

FOUQUETTE, M. J., and LINDSAY, H. L., JR.

1955. An ecological survey of reptiles in parts of northwestern Texas. Texas Jour. Sci., 7(4):402-421.

HUDSON, G. E.

1942. The amphibians and reptiles of Nebraska. Nebraska Conserv. Bull. No. 24, pp. 1-146.

LITTLE, E. L., JR., and KELLER, J. G.

1937. Amphibians and reptiles from the Jornada Experimental Range, New Mexico. Copeia, 1937 (4):402-421.

MASLIN, T. P.

1959. An annotated check list of the amphibians and reptiles of Colorado. Univ. Colorado Studies, Ser. Biol. No. 6, 98 pp.

RUTHVEN, A. G.

1908. Variations and genetic relationships of the garter-snakes. Bull. U. S. Nat. Mus., 61:xii + 201 pp.

SCHMIDT, K. P.

1953. A check list of North American amphibians and reptiles. Univ. Chicago Press, vii + 280 pp.

SMITH, H. M.

1942. The synonymy of the garter snakes (Thamnophis), with notes on Mexican and Central American species. Zoologica, 27(17):97-123.

1956. Handbook of amphibians and reptiles of Kansas (2nd ed.). Univ. Kansas Mus. Nat. Hist. Misc. Publ. No. 9, 356 pp.

SMITH, H. M., and BROWN, B. B.

1946. The identity of certain specific names in Thamnophis. Herpetologica, 3:71-72.

SMITH, H. M., and TAYLOR, E. H.

1945. An annotated check list and key to the snakes of Mexico. Bull. U. S. Nat. Mus., 187, 239 pp.

STEBBINS, R. C.

1954. Amphibians and reptiles of western North America. McGraw-Hill Book Co., Inc., xxiv + 528 pp.

VAN DENBURGH, J.