29 



_, and E. N. Smith. 1997. A new species ofTantilla (Serpentes: Colubridae) from 



northeastern Guatemala. Proc. Biol. Soc. Washington 110: 332-337. 

 Cochran, D. M. 1961. Type specimens of reptiles and amphibians in the United States National 



Museum. U.S. Natl. Mus. Bull. 220: 1-291. 

 Cole, C. J., and L. M. Hardy. 1981. Systematics of North American colubrid snakes related to 



Tantilla planiceps (BlainviWe). Bull. Amer. Mus. Nat. Hist. 171: 199-284. 



, and . 1983a. Tantilla atriceps. Cat. Amer. Amphib. Kept.: 317.1-317.1-317.2. 



, and . 1983b. Tantilla hobartsmithi . Cat. Amer. Amphib. Kept.: 318.1-318.2. 



, and . 1983c. Tantilla planiceps. Cat. Amer. Amphib. Rept.: 319.1-319.2. 



Cope, E. D. 1860. Catalogue of Colubridae in the Museum of the Academy of Natural 



Sciences of Philadelphia. I. Calamarinae. Proc. Acad. Nat. Sci. Philadelphia, 12: 74-79. 

 . "1860" (1861). Descriptions of reptiles from tropical America and Asia. Proc. Acad. 



Nat. Sci. Philadelphia 12: 368-374. 

 . 1863. Description of new American Squamata in the museum of the Smithsonian 



Institution, Washington. Proc. Acad. Nat. Sci. Philadelphia 15: 100-106. 

 . 1866. Fifth contribution to the herpetology of tropical America. Proc. Acad. Nat. Sci. 



Philadelphia 18: 317-323. 

 . "1875" (1876). On the Batrachia and Reptilia of Costa Rica. J. Acad. Nat. Sci. 



Philadelphia, ser. 2 8: 93-154. 

 . 1876. Report on the reptiles brought by Professor James Orton from the middle and 



upper Amazon, and western Peru. J. Acad. Nat. Sci. Philadelphia 8: 159-183. 

 . 1887. Synopsis of the Batrachia and Reptilia obtained by H. H. Smith, in the province 



of Mato Grosso, Brazil. Proc. Amer. Philos. Soc. 24: 44-60. 



. 1894. Third addition to a knowledge of the Batrachia and Reptilia of Costa Rica. Proc. 



Acad. Nat. Sci. Philadelphia 46: 194-206. 



Davis, W. B., and H. M. Smith. 1953. Snakes of the Mexican state of Morelos. Herpetologica 



8: 133-143. 

 Dixon, J. R., R. K. Vaughan, and L. D. Wilson. In press. The taxonomy of Tantilla rubra and 



allied taxa (Serpentes: Colubridae). Southwest. Naturalist. 

 Duellman, W. E. 1961. The amphibians and reptiles of Michoacan, Mexico. Univ. Kansas Publ. 



Mus. Nat. Hist. 15: 1-148. 

 Duenas, C, L. D. Wilson, and J. R. McCranie. In press. A list of the amphibians and reptiles of 



El Salvador, with notes on additions and deletions. Texas Herpetological Symposium 



Volume. 

 Dumeril, A. M. C, G. Bibron, and A. H. A. Dumeril. 1854. Erpetologie generale ou histoire 



naturelle compete des reptiles. Paris. Vol. 7. 

 Dunn, E. R. 1928. New Central American snakes in the American Museum of Natural History. 



Amer. Mus. Novitates 314: 1-4. 



