HERPETOLOGY OF LOWER CALIFORNIA. I49 



Bascanion aurigulum Cope. 



Drymobius aurigulus. 



1861, Cope, Proc. Ac. Nat. Sci. Phila., p. 301. 



Bascanium aurigulum. 



(1875, Cope, Bull. U. S. Nat. Mus., No. 1, pp. 40, 92.) 

 (1883, Yarrow, Bull. U. S. Nat. Mus., No. 24, pp. 113, 191.) 

 (1887, Cope, Bull. U. S. Nat. Mus., No. 32, p. 71.) 

 (1887, Belding, West. Am. Scientist, iii, 24, p. 99.) 



Coluber flag ellif or mis var. aurigulus. 



(1883, S. Garman, Mem. Mus. Compr. Zool. Cambr., viii, 3, pp. 



44, 148.) 

 (1884, S. Garman, Bull. Essex Inst., xvi, 1, p. 26.) 



Bascanium, later ale aurigulum. 



(1892, Cope, Proc. U. S., Nat. Mus., 1891, p. 629.) 



The apparent rarity of this species may be due to ig- 

 norance of its habits. The various expeditions sent by 

 the Academy to Lower California have secured one speci- 

 men. It agrees perfectly with Cope's original description 

 of the only other known representative of the species, 

 secured by Mr. Xantus at Cape San Lucas. 



Although this species is undoubtedly closely related to 

 jB. laterale, no intergradation has been shown, and there 

 seems to be, therefore, no reason for using a trinomial 

 appellation in this connection. 



The present specimen (Cal. Acad. Sci. No. 870) is 

 1.045 m. in length, of which the tail forms 348 mm. It 

 was collected by Gustav Eisen, at San Jose del Cabo, in 

 November, 1893. 



PiTUOPHIS CATENIFER DESERTICOLA Stcju. 



Pityophis sayi bellona. 



1877, Streets, Bull. U. S. Nat. Mus., No. 7, p. 40. 



(1883, Yarrow, Bull. U. S. Nat. Mus., No. 24, p. 106.) 

 Pituophis catenifer deserticola. 



1893, Stejneger, N. A. Fauna, No. 7, p. 206. 



Dr. Streets has recorded a specimen of this snake from 

 San Martin Island, off the Pacific coast of Lower Cali- 

 fornia. It is a locality where J^. catenifer might rather 

 be expected to occur. 



