32 BULLETIN 18 7, UNITED STATES NATIONAL MUSEUM 



Type locality. — Guatemala. 



Range. — Foothills on the Pacific slopes of Guatemala and extreme 

 southern Chiapas, and in central Guatemala ; also perhaps the humid 

 Atlantic slopes of Nuevo Leon (known in Mexico only from Chichar- 

 ras, Escuintla, and Cerro Ovando, Chiapas; doubtfully recorded from 

 near Santiago, Nuevo Leon) . 



Genus ARIZONA Kennicott 



Arisona Kennicott, in Baird, Report on the United States and Mexican boundary 

 survey, vol. 2, 1859, Kept., p. 18. 



Genotype. — Arizona elegans Kennicott. 



Range. — Northern Tamaulipas, central Texas, and western Kansas 

 westward to the coast of southern California and northern Baja Cali- 

 fornia, northward to southwestern Utah, southward probably to south- 

 ern Coahuila and southern Sonora. 



Species. — A single species, with two well-defined subspecies, both 

 occurring in Mexico. 



KEY TO FORMS OF ARIZONA 



1. Dorsal blotches on body larger, usually less than .56 on body, separated from 

 each other by spaces narrower than the blotches; scale rows usually 



29 or 31 elegans elegans 



Dorsal blotches on body smaller, usually more than 56 on body, separated 

 from each other by spaces as broad as or broader than the blotches; 

 scale rows usually 27, seldom 29 elegans occidentalis 



ARIZONA ELEGANS ELEGANS Kennicott " 



Arizona elegans Kennicott, in Baird, Report on the United States and Mexican 



boundary survey, vol. 2, Rept., 1859, pp. 18-19, pi. 13. 

 Arizona elegans elegans Blanchaed, Occ. Pap. Mus. Zool. Univ. Michigan, No. 



150, 1924, p. 3. — Schmidt and Davis, Field book of snakes, 1941, pp. 155-156, 



flg. 44 (midbody pattern). 

 Coluber arlzonae Botjlengeb, Catalogue of the snakes in the British Museum, 



vol. 2, 1894, p. 66 ( substitute name for Arizona elegans Kennicott, a secondary 



homonym of Coluber elegans Shaw, 1802). 



Ty,pe,—\J, S. N. M. Nos. 1722, 4266, two cotypes. 



Type locality. — ^Lower "Rio Grande," Tex., and "Between Arkansas 

 and Cimarron" River, Okla. 



Range. — Northern Tamaulipas and central Texas, Oklahoma, and 

 southwestern Kansas westward through central New Mexico to south- 

 eastern Arizona and central Chihuahua, southward probably to south- 

 ern Coahuila (known in Mexico from Coahuila). 



^* Arizona arizonae arlzonae (Boulenger) to those who suppress secondary homonyms. 



