192 BULLETIN 18 7, UNITED STATES NATIONAL MUSEUM 



Range. — "The mountains of southeastern Arizona, west-central 

 ISTew Mexico, and El Paso County, Texas, and higher elevations on the 

 Mexican Plateau in Chihuahua, Durango, Zacatecas, and Jalisco" (def- 

 inite records are from the states of Chihuahua, Durango, Jalisco, and 

 Zacatecas; its occurrence in Aguascalientes, Nayarit, and Sinaloa is 

 possible or even probable, but no definite records from these states are 

 available) . 



CROTALUS LUCASENSIS Van Denburgh 



Crotalus luoasesisis Van Denbxxegh, Proc. California Acad. Sci., ser. 4, vol. 10, 1920, 

 pp. 29-30, pi. 3, fig. 1— Gloyd, Spec. Publ. Chicago Acad. Sci., No. 4, 1940, pp. 

 206-209, map 16, pi. 21, fig. 2. 



Type.—Calii. Acad. Sci. No. 45888. 



Type locality. — Agaia Caliente, Cape region, Baja California. 



Range. — The southern part of the peninsula of Baja California from 

 about latitude 26° N. (Loreto) to the Cape; the adjacent islands of 

 Santa Margarita and San Jose. 



CROTALUS MITCHELLII MITCHELLII (Cope) 



Caudisona mitchellil Cope, Proc. Acad. Nat. Sci. Philadelphia, vol. 13, 1861, p. 



293. 

 Crotalus mitchellii mitchclUi Klauber, Trans. San Diego Soc. Nat. Hist., vol. 8, 



1936, pp. 154-157, fig. 1, map, pi. 19, fig. 1. 



Type.— Lost; formerly U.S.N.M. No. 52911/2. 



Type locality. — Cape San Lucas, Baja California. 



Range. — "Distrito del Sur of Baja California, intergrading with 0. 

 m. pyrrhus approximately along the border of the two districts; the 

 Pacific island of Santa Margarita and the islands of Ceralvo, Espiritu 

 Santo and San Jose, in the Gulf of California." 



CROTALUS MITCHELLII PYRRHUS (Cope) 



Cmidisona pyrrha Cope, Proc. Acad. Nat. Sci. Philadelphia, vol. IS, 1866 (18CT), p. 



308. 

 Crotalus mitchellii pyrrhus Klauber, Trans. San Diego Soe. Nat. Hist., vol. 8, 



1936, pp. 157-162, fig. 3, map, pi. 19, fig. 2, pi. 20, fig. 1. 

 Crotalus goUlmani Schmidt, Bull. Amer. Mus. Nat. Hist., vol. 46, 1922, pp. 701-702 



(type locality. El Piiion, 5300 feet, San Pedro Martir Mountains, Baja Call- 



Cornia ; type, U. S. N. M. No. 37573). 



Type.—{]. S. N. M. No. 6606. 



Type locality. — Canon Prieto, Yavapai County, Ariz. 



Range. — ^"Southern California, extreme southern Nevac^, western 

 Arizona, and Baja California, including the following: California 

 south of the line Barstow-Ivanpah and east of the coastal plain and 

 the San Gabriel Mountains ; southern Clark County, Nevada ; Arizona 

 west of the line Peach Springs-Williams-Casa Grande-Ajo; extreme 

 northwestern Sonora; Baja California south to the boundary of Dis- 

 trito del Sur; Angel de la Guarda Island in the Gulf of California." 



