1922] Schmidt, Amphibians and Reptiles of Lower California 659 



This form is represented in the collections of the Academj'- of 

 Natural Sciences of Philadelphia by two specimens (A. N. S. P. Nos. 

 16103-4), collected in the Cocopah Mountains of northeastern Lower 

 California by S. N. Rhoads. 



Uta auriculata Cope 



Via auriculata Cope, 1871, p. 303; Stejneger and Barbour, 1917, p. 49. 

 Range. — Sccorro Island, Revilla Gigedo Islands, to which it is confined. 



Uta clarionensis Townsend 



I'ta clarionensis Townsend, 1890, p. 143; Stejneger and Barbour, 1917, p. 50. 

 Range. — Clarion Island, Revilla Gigedo Islands, to which it is confined. 



Uta graciosa (Hallo well) 



Uro-saurus gradosus Hallowell, 1854, p. 92. 

 Uta graewsa Stejneger and Barbour, 1917, p. 50. 



Range. — Southern Nevada, southeastern California, southwestern Arizona, and 

 northeastern Lower California. 



Lower Californian Records. — Santa Rosalia, Mocquard, 1899, p. 307; San 

 Felipe, Meek, 1905, p. 10; Laguna Salada, 80 mi. south of Mexicali, Van Denburgh 

 and Slevin, 1921a, p. 58. 



Mocquard's identifications are not wholly reliable (see above under 

 Uta microscutata) but, on analogy with Sauromalus obesus and Calli- 

 saurus ventralis gabbii, Uta graciosa might be expected as far south as 

 Santa Rosalia. 



Key to the Species of Uta in Lower California and Adjacent Islands 



1. Dorsal granules very small, perfectly smooth; enlarged supraoculars in more 



than one row 2. 



Dorsal granules less than 40 in the length of the head, at least faintly keeled 

 posteriorly; enlarged supraoculars in one row 3. 



2. Caudal scales small, smooth. (Southern Lower California.) thalassina. 



Caudal scales large, keeled, spinose. (Northern Lower California.) . . . .mearnsi. 



3. Dorsal scales nearly uniform, graduated into the smaller laterals 4. 



Dorsal scales with a few median rows abruptly enlarged 13. 



4. Frontal entire. 5. 



Frontal transversely divided 6. 



5. Dorsal scales very small, about 35 in head length. (Northern Lower California.) 



microscutata. 



Dorsal scales larger, a broad band of enlarged scales down the back. (Southern 



Lower California.) nigricauda. 



6. Gular scales about 40; femoral pores 17. (San Pedro Martir Island, Gulf of 



California.) palmeri. 



Gular scales less than 35; femoral pores less than 17 7 



