160 3. IGUANIDJE 



and perhaps Lyon (Mason) counties. The specimens from 

 Mina, Mason and Desert Valley, may possible represent 

 the other subspecies, C. <u. myurus. 



In Utah, it is said to be common in the Lower Santa 

 Clara Valley, in Washington County, and has been taken 

 three miles west of St. George and at Leeds and Virgin, 

 in this county. 



In Arizona, it is common in Yuma (Yuma, Papago 

 Wells, Vicksburg, Tinajas Altas, Dome, Ehrenberg), Mo- 

 have (Needles Peaks, Hackberry, Fort Mohave, Topock), 

 Yavapai (Fort Whipple), Maricopa (Vulture, Phoenix, 

 Tempe, Cave Creek, Agua Caliente), Gila (Roosevelt 

 Lake), Navajo (Camp Apache), Pinal (Casa Grande), 

 Pima (Ajo, Growler Well, Tucson, Fort Lowell, Cata- 

 lina Mountains, Roeble's Ranch, Indian Oasis, Continental, 

 Agua Caliente), Cochise (Fairbank, Apache, Fort Hua- 

 chuca), and Santa Cruz (Fort Buchanan), counties. 



In Lower California, it is probably this subspecies which 

 has been taken at El Llano de Santano, El Rosario, San 

 Fernando, Seven Wells near the Salton River, Gardner's 

 Laguna, San Felipe, Trinidad, San Matias, Canon Esper- 

 anza, San Antonio, Matomi, Agua Escondito, San Luis 

 Island and San Luis Gonzales Bay. I have examined only 

 those from the last two of these localities. 



Remarks. This lizard occurs in California in a few 

 places west of the main mountain ranges. Such are Oak 

 Grove, San Diego County, Vallevista, Riverside County, 

 Cajon Pass, San Bernardino County, and Kelso Creek near 

 Weldon, Kern County. Specimens from these western 

 colonies seem identical with those secured farther east. 



The relation between this subspecies and C. v. myurus 

 is not yet clear. We do not yet know the distribution 

 of the two forms in western Nevada; nor do we know 



