41. 
42. 
43. 
44, 
45. 
46. 
47. 
48. 
49. 
SWE 
Ola 
an 
S15. 
54. 
5s 
2) 9) 
Difis 
58. 
69) 
Duellman, W.E., and R.G. Zweifel. 1962. A synopsis of the lizards of 
the sexlineatus group (genus Cnemidophorus). Bull. Amer. Mus. Natur. 
Hist... 023(3)= 155-2105 
Dunn, E.R. 1936. The amphibians and reptiles of the Mexican expedition 
of 1934. Proc. Acad. Natur. Sci. Philadelphia 88: 471-477. 
Fitch, H.S. 1938. A systematic account of the alligator lizards 
(Gerrhonotus) in the western United States and Lower California. 
Amer. Midl. Naturalist 20(2): 381-424. 
Fitch, H.S. 1980. Remarks concerning certain western garter snakes of 
the Thamnophis elegans complex. Trans. Kansas Acad. Sci. 83(3): 106- 
11S 
Fosdick, M.K. 1968. Distributional records from a collection of 
reptiles from western and central Mexico. Herpeton 3: 1-3. 
Frost, J.S., and J.T. Bagnara. 1976. A new species of leopard frog 
(Rana pipiens complex) from northwestern Mexico. Copeia 1976(2): 
332-338. 
Garstka, W.R. 1982. Systematics of the mexicana species group of the 
colubrid genus Lampropeltis, with an (sic) hypothesis (sic) mimicry. 
Breviora (466): 1-35. 
Gehlbach, F.R. 1965. Herpetology of the Zuni Mountains region, 
northwestern New Mexico. Proc. U. S. Natl. Mus. 116: 243-332. 
Gehlbach, F.R. 1967. Lampropeltis mexicana. Cat. Amer. Amph. Rept. 
Soe 1=55.25 
Gehlbach, F.R. 1974. Evolutionary relations of southwestern ringneck 
snakes (Diadophis punctatus). Herpetologica 30(2): 140-148. 
Gehlbach, F.R., and J.K. Baker. 1962. Kingsnakes allied with 
Lampropeltis mexicana: Taxonomy and natural history. Copeia 1962(2): 
291-300. 
Gehlbach, F.R., and C.J. McCoy, Jr. 1965. Additional observations on 
variations and distribution of the Gray-banded kingsnake, 
Lampropeltis mexicana. Herpetologica 21(1): 35-38. 
Gloyd, H.K. 1940. The rattlesnakes, genera Sistrurus and Crotalus. A 
study in zoogeography and evolution. Spec. Pub. Chicago Acad. Sci. 
(4): i-vii + 1-270. 
Greene, H.W. 1972. Mexican reptiles in the Senckenberg Museum. 
Carnegie Mus. 15p. 
Guillette, L.J., Jr., and H.M. Smith. 1982. A review of the Mexican 
lizard Barisia imbricata, and the description of a new Subspecies. 
Trans. Kansas... Acad. Sci..85(1): 13-33. 
Gunther, A. 1885-1902. Biologia Centrali-Americana. Reptilia and 
Batrachia. Porter; London. 
Hardy, L.M., and R.W. McDiarmid. 1969. The amphibians and reptiles of 
Sinaloa, Mexico. Univ. Kansas Publ. Mus. Natur. Hist. 18(3): 39-252. 
Harris, H.S., Jr., and R. S. Simmons. 1972. An April birth record for 
Crotalus lepidus with a summary of annual broods in rattlesnakes. 
Bull. Maryland Herpetol. Soc. 8(2): 54-56. 
Harris, H. S., Jr., and R. S. Simmons. 1976. The paleogeography and 
evolution of Crotalus willardi, with a formal description of a new 
subspecies from New Mexico, United States. Bull. Maryland Herpetol. 
Soca 2 (1): 1-22. 
