CHECKLIST OF THE SNAKES OF MEXICO 103 



Type locality. — Calabasas Canyon, Ariz. 



Range. — Extreme southern central Arizona, and presumably 

 adjacent Sonora. 



OXYBELIS POTOSIENSIS Taylor 



Oxybelis potosiensis Tatlob, Univ. Kansas Sci. Bull., vol. 27, 1941, pp. 12S-130, 

 pi. 6, figs. 4-6. 



Type.—E. H. Taylor-H. M. Smith Coll. No. 23614. 

 Type locality. — Thirty-eight km. northwest of Ciudad Maiz, San 

 Luis Potosi. 

 Range. — Known only from the type locality. 



Genus OXYRHOPUS Wagler « 



Oxyrhopus Waglek, Natiirliches System der Amphiblen, 1830, p. 185. 



Genotype. — Coluber petalarius Linnaeus. 

 Range. — Central Veracruz into South America. 

 Species. — Total number of forms uncertain.*^ 



OXYRHOPUS BAILEYI (Smith) 



Oxyrhopus petolarius Ruthven {nee Linnaeus), Zool. Jahrb., vol. 32, 1912, p. 326. 

 Clella baileyi Smith, Proc. U. S. Nat. Mus., vol. 92, 1942, pp. 391-394. 



Type.—V.S.l^.M. No. 111261. 



Type locality. — Potrero Viejo, Veracruz. 



Range. — Probably eastern Mexico from central Veracruz into Guate- 

 mala. Known definitely only from the type locality and Cuatoto- 

 lapam, Veracrus.^'^ 



Genus PHYLLORHYNCHUS Stejneger 



Phyllorhynchtis Stejnegeb, Proc. U. S. Nat. Mus., vol. 13, 1S90, pp. 151-152.— 

 Klauber, Bull. Zool. Soc. Sau Diego, No. 12, 1935, pp. 1-31, figs. 1-i, map; 

 Trans. San Diego Soc. Nat. Hist., vol. 9, 1940, pp. 195-212, pi. 8, and map. 



Genotype. — Phyllorhynchus hrowni Stejneger. 



Range. — Southern California, southern Nevada, southern Arizona, 

 western Sonora, and all Baja California. 



Species. — Two species, one with two and the other with three sub- 

 species, are known ; extralimital is P. hrowni lucidus Klauber. 



« We follow Schmidt (as in Schmidt anil Walker, Publ. Field Mus. Nat. Hist., zool. ser., 

 vol. 24, 1943, p. 2!J0 ; et ul.) in the partitioning of the Boulengerian (Catalogue of the 

 snakes in the British Museum, vol. 3, 1800, p. 00) genus Oayrhopus { = Pseui}oboa of many 

 recent authors : cf. Amaral, Mem. Inst. Butantan, vol. 4, 1929, p. 205 ; type, Pseudohoa 

 coronata Schneider), in which was included the Oxyrhopus (sensu stricto) and Clelia of 

 this check list, and perhaps others extialiiiiital. 



** Dr. Joseph S. Bailey is expected to elucidate the taxonomy of this variable group of 

 snakes. Until then any attempt to evaluate the many named forms is futile. 



*" Boulenger's record of Oxyrhopus petolarius from .'^toyac, Guerrero (Catalogue of the 

 snakes in the British Museum, vol. 3, 1896, p. 103) probably refers to the town known 

 by the same name in the state of Veracruz. 



