164 BULLETIN 187, UNITED STATES NATIONAL MUSEUM 



Potosi to western Hidalgo (recorded from the states of Cliihualiua, 

 Durango, Guanajuato, Hidalgo, San Luis Potosi, and Sonora). 



THAMNOPHIS MARCIANA (Baird and Girard) 



Eutaenia marciana Baibd and Giraed, Catalogue of North American reptiles, 



1853, pp. 36-37. 

 Thamnophis marciana Ruthven, U. S. Nat. Mus. Bull. 61, 1908, pp. 849-852, pi. 



93. — DiTMAES, Field book of North American snakes, 1939, pi. (three lower 



figs.). 



Type.—V.S.'HM. No. 844, a cotype. 



Type locality.- — Restricted to Red River, Ark. (included also New 

 Braunfels, near San Antonio, San Pedro, and Indianola, Tex.). 



Range. — Kansas, Oklahoma, and central Texas west to southeastern 

 California and probably northwestern Baja California; southward to 

 northeastern Durango and northwestern Tamaulipas (known in 

 Mexico from the states of Cliihuahua, Durango, Coahuila, Nuevo Leon, 

 Sonora, and Tamaulipas; a record from San Luis Potosi [Garman, 

 Bull. Essex Inst., vol. 19, 1887, pp. 7-8] seems very doubtful). 



THAMNOPHIS MELANOGASTER MELANOGASTER (Peters) 



Tropidonotus melanogaster Petteiis, Monatsb. Akad. Wiss. Berlin, 1864, pp. 



389-390. 

 Thamnophis melanogaster McLain, Contributions to Neotropical herpetology, 



1899, pp. 3-4. 

 Thamnophis melanogaster melanogaster Smith, Zoologica, vol. 27, 1942, pp. 



116-117. 

 Tropidonotus Baronis MiiUeri Trosches., in Miiller, Reisen in den Vereinigten 



Staaten, Canada, und Mexico, 1865, pp. 610-611 (type locality, Mexico; type 



unknown; name invalid because not binominal). 

 Tropidonotus baronis-mUlleri Boulenger, Catalogue of the snakes in the British 



Museum, vol. 1, 1893, p. 226 (in synonymy; first use of name in proper form; 



type locality, Plateau of Mexico, near Mexico City; type in Brit. Mus. Nat 



Hist.). 

 Tropidonotus mesomelanus Jan, Arch. Zool. Anat. Fis., vol. 3, 1865, pp. 230-231 



(type locality, Mexico; cotypes in Milan, Torino, Paris, Breslau, Vienna Mus., 



and Westphal Coll. ; lectotype in Vienna Mus.'°) . 



Type. — Berlin Mus., 2 cotypes. 



Type locality. — Mexico. 



Range. — Central Mexico east to Distrito Federal and central Vera- 

 cruz (known from the states of Mexico, Veracruz, and from Distrito 

 Federal). 



THAMNOPHIS MELANOGASTER CANESCENS Smith 



Thamnophis melanogaster canescens Smith, Zoologica, vol. 27, 1942, pp. 117-120. 



Type.— II. H. Taylor-H. M. Smith Coll. No. 5023. 

 Type locality. — Chapala, Lake Chapala, Jalisco. 



*• Figured on pi. 5, livr. 27, Iconographie g6n6rale des opliidiens, 1868. 



