LITERATURE CITED
Reading edition
Baird, S. F. and Girard, C.
1853. Catalogue of North American Reptiles in the museum of the Smithsonian Institution. Part I.—Serpents. Smithsonian Misc. Colls., 2:1-172.
Blanchard, F. N.
1938. Snakes of the genus Tantilla in the United States. Zool. Ser. Field Mus. Nat. Hist., 20(28):369-376.
Conant, R.
1958. A field guide to reptiles and amphibians. Houghton Mifflin Co., Boston, 366 pp.
Cope, E. D.
1900. The crocodilians, lizards, and snakes of North America. U. S. Nat. Mus. Rept. (1898), 153-1270.
Dowling, H. G.
1951. A proposed standard system of counting ventrals in snakes. British J. Herpetology, 1(5):97-99.
1957. A review of the amphibians and reptiles of Arkansas. Occas. Paps. Univ. Arkansas Mus., No. 3:1-51.
Dunn, E. R.
1928. A tentative key and arrangement of the American genera of Colubridae. Bull. Antivenin Inst. Amer., 2 (147):18-24.
Force, E. R.
1935. A local study of the opisthoglyph snake Tantilla gracilis Baird and Girard. Papers Michigan Acad. Sci., Arts and Letters, 20:645-659.
Kirn, A. J., Burger, W. L., and Smith, H. M.
1949. The subspecies of Tantilla gracilis. Amer. Midl. Nat., 42(1):238-251.
Peters, J. A.
1960. The snakes of the subfamily Dipsadinae. Misc. Pubis. Mus. Zool., Univ. Michigan, No. 114:1-224.
1964. Dictionary of herpetology. Hafner Publ. Co., New York, 392 pp.
Schmidt, K. P. and Davis, D. D.
1941. Field book of snakes. G. P. Putnam's Sons, New York, 365 pp.
Smith, H. M. and Sanders, O.
1952. Distributional data on Texan amphibians and reptiles. Texas J. Sci., 4(2):204-219.
Taylor, E. H.
1936. Notes and comments on certain American and Mexican snakes of the genus Tantilla, with descriptions of new species. Trans. Kansas Acad. Sci., 39:335-348.
Wright, A. H. and Wright, A. A.
1957. Handbook of snakes. Comstock Publ. Assoc, Cornell, Vol. II, pp. 565-1105.
Department of Biology, The University of New Mexico, Albuquerque, 87106, and Department of Zoology, The University of Arizona, Tucson, 85721.
Transmitted July 11, 1967.
Textual representation of complete dorsal scale formula on page 622.
156 + 7(2)13+ 7(4)14 156 + 7(11)13 ,
6 + 7(2) +7(5)6 + 7(11)6 = 6 + 7(17)
14 13 ,
6 + 7(18)+7(25)
14+ 7(26)15 146 + 7(38)13+7(39)14 ,
6 + 7(36) +7(42)
15 14 ,
-6(45)+7(53)
157 + 8(67)14+ 7(69)15 14 15 ,
6 + 7(90)+7(93)6 + 7(99)
14 15(122).
+ 7(100)