CHECKLIST OF THE SNAKES OF MEXICO 91 



Range. — Nayarit to the Isthmus of Tehuantepec (recorded from 

 numerous localities in the states of Guerrero, Jalisco, Michoacan, 

 Nayarit, Oaxaca, Sinaloa, and Sonora). 



LEPTOPHIS DIPLOTROPIS FORRERI Smith 



Leptophis dipJoiropis forreri Smith, Proc. U. S. Nat. Mus., vol. 93, 1943, p. 443. 



Type. — Brit. Mus. Nat. Hist., spec, m of Boulenger's Catalogue of 

 the snakes in the British Museum, vol. 2, 1894, p. 111. 

 Ti/pe locality. — Tres Marias Islands. 

 Range. — The type locality. 



LEPTOPHIS MEXICANUS MEXICANUS Dumeril, Bibron. and DnmerU 



Leptophis mexicanus Dumekil, Bibkon, and Dumeril, Erpetologie g^n^rale, vol. 



7, pt. 1, 1854, pp. 536-537. — Ditmabs, Snakes of the world, 1931, pi. 19 (upper 



fig.). 

 Leptophis mexicunus mexicanus Olivek, Occ. Pap. Mus. Zool. Univ. Michigan, 



No. 4()2, 1942, p. 10. 

 AhuetuUa modesta Gunther, Ann. Mag. Nat. Hist., ser. 4, vol. 9, 1872, p. 26, pi. 6, 



fig. C (type locality, Rio Chisoy, below Cubulco, Guatemala; type in Brit. 



Mus. Nat. Hist.). 

 Herpetodnjas carinatus Baebouk and Cole (nee Linnaeus), Bull. Mus. Comp. 



Zool., vol. 50, 1900, p. 152. 

 ChironiuH carinatus Schmidt and Andrews (nee Linnaeus), Publ. Field Mus. 



Nat. Hist., zool. ser., vol. 20, 1936, pp. 173, 1S6. 



Type. — Mus. Hist. Nat, Paris, two cotypes. 



T'ype locality. — Mexico. 



Range. — Southern Tamaulipas and Nayarit south along both coasts 

 to Costa Rica, excluding northern Yucatan (recorded from numerous 

 localities in the states of Campeche, Chiapas, Guerrero, Jalisco, 

 Nayarit, Oaxaca, Puebla, San Luis Potosi, Tabasco, Tamaulipas, and 

 Veracruz). 



LEPTOPHIS MEXICANUS YUCATANENSIS Oliver 



Leptophis mexicanus yucatanensis Ouver, Occ. Pap. Mus. Zool. Univ. Michigan, 

 No. 462, 1942, pp. 10-12. 



Type.—M\xs. Zool. Univ. Mich. No. 83940. 

 Type locality. — Coba, Quintana Roo. 



Range. — Northern part of Yucatan Peninsula (known only from the 

 state of Yucatan and territory of Quintana Roo). 



LEPTOPHIS OCCIDENTALIS PRAESTANS (Cope) 



Thrasops praestans Cope, Proc. Acad. Nat. Sci. Philadelphia, vol. 20, 1868, pp. 



309-310. 

 Leptophis occidentalis praestans Oliver, Occ. Pap. Mus. Zool. Univ. Michigan, 



No. 462, 1942, pp. 16-17. 

 L.[eptophis] occidentalis Cope, Proc. Amer. Philo.s. Soc, vol. 23, 1886, p. 279. — 



DiTMAES, Snakes of the world, 1931, pi. 19 (lower fig.). 



Cotypes.— U.S.'N.M. No. 6754. 



