48. CROTALUS 945 
A specimen (C. A. S. No. 13586) from South Coronado 
Island had eaten a lizard, Plestiodon skiltonianus. 
215. Crotalus enyo Cope 
Lower CaLirorRNiA RATTLESNAKE 
Plate 103 
Caudisona enyo Cops, Proc. Acad. Nat. Sci. Phila., 1861, p. 293 (type 
locality, Cape St. Lucas, Lower California); Corr, Proc. Acad. 
Nat. Sci. Phila., 1866, p. 309. 
Crotalus enyo Cope, Bull. U. S. Nat. Mus., No. 1, 1875, p. 33; Cope in 
Yarrow, Surv. W. tooth Merid., Vol. V, 1875, p. 534; YaRRow, 
Bull. U. S. Nat. Mus., No. 24, 1883, pp. 12, 74; Core, Bull. U. S. 
Nat. Mus., No. 32, 1887, p. 90; Betpinc, West American Scientist, 
Vol. III, No. 24, 1887, p. 98; Cope, Proc. U. S. Nat. Mus., Vol. 
XIV, 1892, p. 693; Van DensBurau, Proc. Cal. Acad. Sci., Ser. 2, 
Vol. 5, 1895, p. 157; Mc Lain, Contributions to Neotropical Her- 
petology, 1899, p. 5; Core, Report U. S. Nat. Mus. for 1898, 1900, 
p- 1189, fig. 343; Mocquarp, Miss. Sci. au Mexique, Pt. II, Rept., 
1909, p. 967, pl. 77, figs. 4, 4a; STEJNEGER & Barzour, Check List 
N. Amer. Amph. Rept., 1917, p. 109; Van Densurcu & SLevin, 
Proc. Cal. Acad. Sci., Ser. 4, Vol. XI, 1921, pp. $3, 71; NELson, 
Mem. Nat. Acad. Sci., Vol. XVI, 1921, pp. 114, 115; TERRON, 
Mem. y Rev. Soc. Cient. Antonio Alzate, Vol. 39, 1921, p. 164. 
Crotalus oregonus var. enyo GARMAN, Mem. Mus. Compr. Zool., Cambr., 
Vol. VIII, No. 3, 1883, p. 174; Garman, Bull. Essex Inst., Vol. 
XVI, No. 1, 1884, p. 35. 
Crotalus tigris BouLeNGER, Cat. Snakes Brit. Mus., Vol. III, 1896, 
p. 580 (part); Mocquarp, Nouv. Arch. Mus. Hist. Nat., Paris, 
Ser. 4, Vol. I, 1899, p. 333; TreRron, Mem. y Rev. Soc. Cient. 
Antonio Alzate, Vol. 39, 1921, p. 188. 
Description—Size moderate. Head broad, flat- 
topped. Rostral as high as, or higher than, wide, in con- 
tact with anterior nasal. Two nasals. Two preoculars. 
Three postoculars. A large scale just in front of supra- 
ocular. Supraocular large but not raised into a horn-like pro- 
cess; separated from its fellow by from three to five irregu- 
lar rows of scales. Thirteen to 15 superior and 13 to 15 
inferior labials, first pair of latter in contact on median line 
