130 BULLETIN 18 7, UNITED STATES NATIONAL MUSEUM 



Range. — Southern Great Bend region of Tves-tern Texas, west to 

 the vicinity of El Paso, Tex., and Lake Santa Maria, Chihuahua, 

 southward through central Chihuahua, and northward in the Rio 

 Grande Valley in New Mexico (recorded in Mexico only from 20 miles 

 south of Chihuahua and Lake Santa Maria, Chihuahua; it may be 

 expected in Coahuila and perhaps Nuevo Leon). 



SONORA SEMIANNULATA ISOZONA (Cope) 



Contia isozona Cope, Proc. Acad. Nat Sci. Philadelphia, vol. 18, 1866, p. 304. 

 BoHora semiannnlata Van Denbukgh, Occ. Pap. California Acad. Sci., vol. 10. 



1922, pp. 863-865, pi. 96.— Woodbuky, Bull. Univ. Utah, vol. 21, No. 5, 1931, 



p. 95, figs. 41, 42. 

 Bonora setnimxnulata semiannulata Stickel, Copeia, 1938, No. 4, p. 185 (part). 

 Bonora semiannulata isozona Stickel, Proc. Biol. Soc. Washington, vol. 56, 1943, 



pp. 120-121. 



Type.—V.^.'^M. No. 11417. 



Type locality. — Fort Whipple, Yavapai County, Ariz. 



Range. — Perhaps extreme northern Sonora and northwestern Chi- 

 huahua, northward to the Snake River region of Idaho, westward to 

 Inyo County, Calif., eastward through most of Arizona and Utah, 

 and southward through the northern half of Baja California on the 

 east coast (recorded in Mexico only Santa Rosalia, Ba]a California; 

 a record for Jaral, Coahuila^ is apparently incorrect). 



SONORA SEMIANNULATA LINEARIS Stickel 



Bonora miniata linearis Stickel, Copeia, 1938, No. 4, p. 189. 



Bonora semiannulata linearis Sticicel, Proc. Biol. Soc. Washington, vol. 56, 1943, 

 p. 121. 



Type.—L. M. Klauber Coll. (San Diego, Calif.) No. 2013. 



Type locality. — Seeley, Imperial County, Calif. 



Range. — Northeastern Baja California through southeastern Cali- 

 fornia to southeastern San Bernardino County (recorded in Mexico 

 only from the Cocopah Mountains, Baja California). 



SONORA TAYLORI (Boulenger) 



Contia taylori Boulengee, Catalogue of the snakes iu the British Museum, vol. 2, 

 1894, p. 265, pi. 12, fig. 3. 



Bonora taylori Stejnegeu and Baebour, A check list of North American amphib- 

 ians and reptiles, ed. 1, 1917, p. 92.— Stickel, Copeia, 1938, No. 4, p. 184.— 

 MuLAiK and Mulaik, Copeia, 1941, No. 4, p. 263. 



Bonora episcopa taylori Stickel, Proc. Biol. Soc. Washington, vol. 56, 1943, 

 p. 122.'" 



Type.— Brit. Mus. Nat. Hist. 



Type locality.— Restricted to Duval County, Tex. (included "Nuevo 

 Leon"). 



^ We hesitate to accept the converging trends of episcopa and taylori, pointed out by 

 Bticliel, as suflScient evidence of intergradation. 



