CHECKLIST OF THE SNAKES OF MEXICO 33 



ARIZONA ELEGANS OCCIDENTALIS Blanchard " 



Arizona elegans occidentaUs Blanchakd, Occ. Pap. Mus. Zool. Univ. Michigan, 

 No. 150, 1924, pp. 1-3, table 2. — Schmidt and Davis, Field book of snakes, 

 1<M1, pp. 156, 158, figs. 43, 44, pi. 17 (lovper fig.). 



Arizona elegans Van Denburgh, Occ. Pap. California Acad. Sci., vol. 10, 1922, 

 pp. 702-704 (part), pi. 73 (full-length photographs). 



Type.—U. S. N. M. No. 54372. 



Type locality. — La Jolla, Calif. 



Range. — Arizona (except southeastern corner), extreme south- 

 western Utah, southern Nevada, southern California, extreme northern 

 Baja California, Sonora (except northeastern corner) and extreme 

 central western Chihuahua (known from several localities in Baja 

 California, and from Punta Pefiascosa, Sonora.^ Casas Grandes and 

 Samalayuca, Chihuahua). 



Genus CHERSODROMUS Reinhardt 



Chersodromus Reinhaedt, Vid. Medd. Naturh. Foren. Kj0benhavn, 1860, pp. 242- 



243, pi. 4, fi^s. 10, 11. 

 Opisthiodon Peters, Monatsb. Akad, Wiss. Berlin, 1861, p. 461 (type, O. torquatua 



Peters). 



Genotype. — Chersodromus Jiel)ma7ini Reinhardt. 

 Ramge. — Foothills of central Veracruz. 

 Species. — One. 



CHERSODROMUS LIEBMANNI Reinhardt 



Chersodromus licbmaniii Reinhardt, Vid. Medd. Naturh. Foren. Kj0benhavn, 



1860, pp. 243-254, pi. 4, figs. 10, 11. — Jan, Iconographie g^nerale des ophidiens, 



livr. 12, 1865, pi. 3, fig. 2. — Taylor and Smith, Univ. Kansas Sci. Bull., vol. 



25, 1938 (1939), pp. 251-252.— Smith, Proc. U. S. Nat. Mus., vol. 93, 1943, 



p. 402. 

 Chersodromus nigricans Reinhardt, Hid., p. 245 (type locality, Mexico ; type in 



Copenhagen Mus.?). 

 Opisthiodon torquatus Peters, Monatsb. Akad. Wiss. Berlin, 1861, p. 461 (type 



locality, Huanusco [=Huatusco], Veracruz; type in Berlin Mus.). 

 Dirosema collare Werner, Zool. Anz., vol. 23, 1900, p. 197, figs, 3-5 (type locality, 



Mexico; type?). 



Type. — Copenhagen Mus. ? 

 Type locality. — Mexico. 



Range. — Foothills of central Veracruz (know^n from Cuautlapan, 

 Huatusco, Metlac, Mirador, Orizaba). 



Genus CHILOMENISCUS Cope 



Chilomeniscus Cope, Proc. Acad. Nat. Sci. Philadelphia, vol. 12, 1860, p. 339. 

 Genotype. — Chilomeniscus stramineus Cope. 



^Arizona arizonae occidentaUs Blanchard to those who suppress secondary homonyms. 



