HERPETOLOGY OF LOWER CALIFORNIA. IOO7 



Of the three adult specimens secured by Messrs. 

 Stowell and Lunt, one is as dark as the type of B . ■piceiifn, 

 while the others are somewhat lighter, especially on the 

 tail. A young specimen (No. 1632) is not distinguishable 

 from individuals of B . f. frenatuni of the same size. 



L. S. Jr. U. Nos. 1132, 1133, 1632, 1720, vicinity of 

 Ensenada, L. C, June 11, 1893. 



Thamnophis hammondii (Kenn.) 



The two young garter-snakes (L. S. Jr. U. Nos. 1721 

 and 1722) collected on San Pedro Martir Mt., July 3, 

 1893, evidently belong to this species, although each has 

 a well-developed dorsal line extending over its whole 

 length. The supralabial plates are 7-7 and 7-8; the 

 scale rows, 21. 



Crotalus ruber (Cope). 



A head (L. S. Jr. U. No. 1718) from Ensenada must 

 be referred to this form if it be admitted that ruber is sep- 

 arable from atrox. The difference is purely one of 

 color, but at present seems to be quite constant, however 

 additional specimens may affect our views. The mere 

 fact that the difference is slight seems no reason for using 

 a trinomial. 



Crotalus lucifer B. & G. 



A head (L. S. Jr. U. No. 1719) from San Pedro 

 Martir Mt. seems to belong to this species, although it is 

 so black as almost to conceal the characteristic markings. 



Dr. Streets's " Crotalus adatnanteus atrox" from Los 

 Coronados Islands, referred to on page 156, really belongs 

 to this species, as Dr. Stejneger has already shown.* 



*U. S. N. M. Eeport, 1893, p. 445, 1895. 



