HERPETOLOGY OF LOWER CALIFORNIA. 159 



Crotalus mitchellii Cope. 



Caudifiona mitchellii. 



1861, Cope, Proc. Ac. Nat. Sci. Phila., p. 293. 

 (1866, Cope, Proc. Ac. Nat. Sci. Phila., p. 310.) 



Crotalus mitchellii. 



(1875, Yarrow from Cope, U. S. G. G. Surv. W. lOOtb Mer., v, 



p. 535.) 

 (1875, Cope, Bull. U. S. Nat. Mus., No. 1, pp. 33, 92.) 

 1883, Yarrow, Bnll. U. S. Nat. Mus., No. 24, pp. 73, 189. 

 (1887, Cope, Bull. U. S. Nat. Mus., No. 32, p. 90.) 

 (1887, Belding, West Am. Scientist, iii, 24, p. 98.) 

 (1892, Cope, Proc. U. S. Nat. Mus., 1891, p. 694.) 

 1894, Van Denburgh, Proc. Cal. Ac. Soi., Ser. 2, iv, p. 450. 



Crotalus pyrrhus. 



1877, Streets, Bull. U. S. Nat. Mus., No. 7, p. 39. 

 (1883, Yarrow, Bull. IT. S. Nat. Mus., No. 24, p. 73.) 

 (1890, Townsend, Proc. U. S. Nat. Mus., xiii, p. 144.) 

 (1891, Stejneger, West Am. Scientist, vii, April, p. 165.) 

 (1892, Cope, Proc. U. S. Nat. Mus , 1891, p. 694.) 



Crotalus oregoniis initchellii. 



(1883, S. Garman, Mem. Mus. Compr. Zool. Cambr., viii, 3, p. 173.) 

 (1884, S. Garman, Bull. Essex Inst., xvi, 1, p. 35.) 



Since the identity of C . pyrrhus with C. mitchellii was 

 shown in these Proceedings (1894, p. 450), the Academy 

 has obtained twelve additional specimens of this snake. 

 These show as much individual variation as regards the 

 scales on the head as the ten specimens already recorded. 

 One is deep pinkish buff in general coloration, while the 

 others are of the more usual grayish tint. Among them 

 are three very young specimens which Mr. Vaslit informs 

 me were taken from a large female secured at San Jose 

 del Cabo, thus showing that this species is ovoviviparous. 

 The largest specimen is somewhat longer than any pre- 

 viously recorded from Lower California, being forty-one 

 inches in length. 



This species, which seems to be most closely allied to 

 Crotalus cerastes of our southwestern deserts, was origin- 

 ally described from a specimen obtained by Mr. John 



