CROTALUS. 195 
Hab. Muxico, Presidio (Forrer), Colima (Xantus), Mezquital del Oro, Zacatecas (A. C. 
Buller), City of Mexico (Doorman), San Luis Potosi, Guanajuato, Guadalajara, 
Silao, Zamora (Dugés), Puebla (Com. Geogr.). 
10. Crotalus adamanteus. 
Crotalus adamanteus, Beauv. Trans. Am. Phil. Soc. iv. p. 3868 (1824) ; Baird & Gir. Cat. N. Amer. 
Rept. p. 3; Cope, Bull. U.S. Nat. Mus. no. 32, p. 90. 
Crotalus atroz, Baird & Gir. Cat. N. Amer. Rept. pp. 5, 156; Garman, Bull. Essex Inst. xix. 
1888, p. 118. 
Crotalus adamanteus, var. atroz, Garman, Mem. Mus. Comp. Zool. viii. p- 113 (1883). 
Hab. Nort America, Southern United States—Mexico, City of Chihuahua (Wilkin- 
son), San Pedro and Monclova (Garman). 
