CHECKLIST OF THE SNAKES OF MEXICO 155 



Range. — ^Western Missouri and eastern Kansas through western 

 Oklahoma to southeastern New Mexico, east to Fort Worth and 

 Houston, Tex., and south to central Nuevo Leon, and Coahuila 

 (known from several localities in Coahuila, Nuevo Leon, and 

 Tamaulipas). 



NATRIX RHOMBIFERA RHOMBIFERA (Hallowell) 



Tropidonotus rhombifera Hallowell, Proc. Acad. Nat. Sci. Philadelphia, vol. 6, 



1S52, p. 177. 

 Natrix rlwmhiiera rhomhifera Clay, Ann. Carnegie Mus., vol. 27, 1938, pp. 



251-253 ; Copeia, 1938, no. 4, p. 177. — Ditmaks, Field book of North American 



snakes, 1939, p. 220, pi. 15 (two upper figs.).— Smith, Proc. U. S. Nat. Mus., 



vol. 93, 1943, pp. 454-455. 



Type.— Acud. Nat. Sci. Phila. No. 5047. 



Type locality. — Arkansas River and its tributaries near the north- 

 ern boundary of the Creek Nation. 



Range. — Southern Illinois and Indiana south through Alabama 

 and central Texas, reaching central Tamaulipas; southern Veracruz 

 to extreme eastern Tabasco and southwestern Campeche, possibly also 

 Guatemala; not in the Yucatan Peninsula, southern Tamaulipas, or 

 the northern and central portions of Veracruz (known from Coahuila^ 

 Nuevo Leon., and from Emiliano Zapata, Macuspana, and Tepetitan, 

 Tahaaco; probably occurs in northern Tamaulipas and southern Vera- 

 cruz, but no records are available) . 



NATRIX RHOMBIFERA BLANCHARDI Clay 



'Matrix rhombifera blanchardi Clay, Ann. Carnegie Mus., vol. 27, 1938, pp. 

 251-2.53, pi. 25.— Smith, Proc. U. S. Nat. Mus., vol. 93, 1943, p. 455. 



Type. — Carnegie Mus. No. 9512. 



Type locality. — Vicinity (within 85 miles) of Tampico, Tamauli- 

 pas. 



Range. — Atlantic coast south from central Tamaulipas through 

 southeastern San Luis Potosi, to south-central Veracruz (recorded 

 from extreme southeastern Nuevo Leon, San Luis Potosi, Tamaulipas, 

 and Veracruz). 



NATRIX VALIDA (Kennicott) 



Regiyia valida Kennicott, Proc. Acad. Nat. Sci. Philadelphia, vol. 12, 1860, pp. 



334-335. 

 Natrix valida Cope. Proc. U. S. Nat. Mus., vol. 14, 1892 p. 670. — Taylok, Univ. 



Kansas Sci. Bull., vol. 26, 1939 (1940), pp. 448-450, fig. 3. 

 Tropidonotus tephroplevra Cope, Proc. Acad. Nat. Sci. Philadelphia, vol. 12, 1S60, 



pp. 341-342 (type locality, Cape San Lucas, Baja California; type, originally 



U.S.N.M. No. 4(:81). 

 Tropidonotus celaeno Cope, Proc. Acad. Nat. Sci. Philadelphia, 1860, p. 341 (type 



locality. Cape San Lucas, Baja California; type, originally U.S.N.M. 



No. 341). 



