1922] Schmidt, Amphibians and Reptile* of Lower California 641 



and Arizona specimens described by Stejneger. In the two specimens 

 from La Paz in the Albatross collection (U. S. N. M. No. 64443, A. M. N. 

 H. No. 6808), the ventral scales number 126 and 133, and in the specimen 

 from Espiritu Santo already mentioned (U. S. N. M. No. 12633) they 

 number 139. 



In view of this agreement in the ventral scale character, I believe we 

 are justified in assigning the name ater definitely to the species in southern 

 Lower California. 



U. S. N. M. A. M. N. H. U. S. N. M. 



Sauromalus obesus (Baird) 



Euphryne obesa Baird, 1858, p. 253. 



Sauromalus ater Stejneger and Barbour, 1917, p. 46. 



Range. — Southern Nevada, southwestern Utah, Arizona,, southern California, 

 and northern Lower California, south to Mulege on the Gulf side. 



Lower C alifornian Records. — Santa Agueda, San Ignacio, Mulege, Mocquard, 

 1899, p. 302; "Northern Lower California," Meek, 1905, p. 9. 



The application of the name ater to the Lower Californian species re- 

 leases Baird's name obesus, type locality Fort Yuma, Arizona, for the 

 form occurring in the United States. Dr. Roule has kindly included a 

 photograph of the ventral surface of one of the specimens recorded by 

 Mocquard from the middle of the gulf side of the peninsula of Lower 

 California with the photograph of the type of ater. The ventral scale 

 count, 160, agrees closely with that of the series described by Stejneger 

 (loc. cit.). 



Sauromalus varius Dickerson 

 Plate NLIX 

 Sauromalus varius Dickerson, 1919, p. 464. ' 



Range. — Known only from the type locality, San Esteban Island, to which it is 

 doubtless confined. 



l Type: U. S. N. M. No. 64441. Paratypes: U. S. N. M. Nos. 64560-71, A. M. N. H. Nos. 2701 

 5610-20, 5625-32, 5634-5, 5637-8. 



