POISONOUS SNAKES OF NORTH AMERICA. 445 



The Pacific Rattlesnakk. 



Crotalus lucifer,* Baird and Girard 



Plate 13. 



1842. — f Crotalus oregonus, Holbrook, N. Am. Herpet., 2 ed., iii, p. 21, pi. iii. — De 

 Kay, Zool. N. Y., iii, p. 57 (1842).— Baikd aud Uikard, N. Am. Serp., 

 p. 145 (1853).— Baikd, Pac. R. R. Rept. x, p. 14, pi. xxiv, fig. 6 (1859).— 

 Cope, Proc. Pliila. Ac, 1859 (p. 337). 

 1852. — Crotalus lucifer, Baird and Girard, Proc. Phila. Acad., vi, p. 177. — Baird 

 and Girard, Cat. N, Am. Serp., p. 6 (1853).— Girard, U. S. Expl. Exp., 

 Herpet., p. 187, pi. ^v, figs. 1-6 (1858).— Baird, Pac. R. R. Rep., x, 

 Williamson's R, in 1855, p. 10 (1859).— Cope, Proc. Phila. Acad., 1859, 

 p. 337. — Cope in Wheeler's Surv. West 100 Mer., v, p. 533 (1875).— Cope 

 Bull. U. S. Nat. Mus., No. 1, p. 33, (1875).— Cooper, Pac. R. R. Rep., 

 XII, Pt. iii, p. 295 (18G0).— Lord, Natural. Vancouv. Isl., ii, p. 303 (1866)— 

 LocKiNGTox, Amer. Natural., 1880, p. 295. — Garman, Rept. Batr. N. Am., 

 I, Ophid., p. 114 (1883).— Yarrow, Bull. LI. S. Nat. Mus., No. 24, Check 

 List, pp. 12, 76 (1883).— Tow XSEND, Proc, U. S. Nat. Mus., x, 1887, p. 

 239.— Behr, Proc. Calif. Acad. Sc. (2) i, June 1888, p. 94.— Stejneger, N. 

 Amer. Faima, No. 5, p. Ill (1891). — Stejneger, N. Amer. Fauna, No. 7, p. 

 218 (1893.)— CouES, Hist. Exp. Lewis and Clark, iii, pp. 898, 968 (1893).— 

 Denburgh, Bull. U. S. Fish Comm., 1894, p. 57.— Caudisona lucifer, 

 Cope, in Mitchell's Res. Ven. Rattlesu., p. 121 ,1861).— Cope, Proc. 

 Phila. Acad., 1866, p. 309.— CouES, in Wheeler's Surv. West 100 Mer., v 

 (p. 606) (1875). 



1875. — Crotalus conjluentus, (part) Yarroav, in Wheeler's Surv. West 100 Mer., 

 V, p. 530. 



1877. — Crotalus adamanteus atrox, Streets, Bull. U. S. Nat. Mus. No. 7, p. 40 (not 

 of B. &G.) 



1883. — Crotalus confiuer.tus lucifer, Cope, Proc. Phila. Acad., 1883, pp. 11, 19, 22. — 

 Cope. Proc.U. S. Nat. Mus., xiv, 1891, p. 692 (1892).— Cope, Proc. Phila. 

 Acad., 1893, p. 183. 



1859. — Crotalus lecontei, Hallowell, Rep. Pac. R. R., X, Williamson's Route in 

 1853, p. 18 (not of 1852). 



1863. — Crotalus adamanteus, var lucifer, Jan, Eleuc. Sist. Olid., p. 124. 



1883. — Crotalus oreijonw^, var lucifer, Garman, Rept. Batr. N. Am., i, Ophid., p. 

 173. 



1892. — Crotalus conflueutus lecontei, Cope, Proc. U. S. Nat. Mus., xiv, p. 692 (not 

 of Ha"ow.). 



1S68.— 1 Crotalus haUoivelU, Cooper, in Cronise, Nat. Wealth Calif., p. 483 (uom. 

 uud.). — Cooper, Proc. Calif. .a.cad. Nat. Sc, iv, 1870, p. 68 (nom. uud.). 



i^i(7Mres.— Girard, U. S. Expl. Exp., Herpet., Atlas, pi. xv, figs. 1-6 (1858).— 

 Baird, Pac. R. R. Rep., x, Williamson's Route in 1855, pi. xi (1859). — Hal- 

 lowell, Pac. R. R. Rep., x, Williamson's Route in 18.53, pi. iii (1859).— Stand- 

 ard Natural History, iii, jil. facing, p. 398 (1885). 



Description, f — Muzzle broad. Scales between the superciliaries 

 (supraoculars) numerous, small, and uuiform. Plates on the top of 

 head, 4 prefrontal, (iuteruasals) 4 postfroutal (prefontals), or else irreg- 

 ular. Three rows scales between the suborbitals and labials. Labials 

 16 above; first aud fifth largest; 15 below. Dorsal rows 25, exterior 



* Probably so named with reference to its supposed diabolical appearance ornature. 

 t The original description by S. F. Baird, in Baird and Girard's N. Am. Serp., p. 6. 



