36 University of California Publications in Zoology (Vou. 9 
Jacinto mountains. In some places, as Cajon Pass, San Ber- 
nardino County, and Warner’s Pass, San Diego County, it crosses 
the divide onto the desert. In altitude it ranges from just above 
sea-level to over five thousand feet. In a series of some thirty 
specimens from the San Jacinto Mountains, from localities rang- 
ing in altitude from 1500 to 5000 feet, no differentiation accord- 
ing to altitude could be discovered. The color of the soil, how- 
ever, could readily be determined by the coloration of the lizards. 
A study was made of specimens collected at the following 
localities: Campo, Dulzura, Warner’s Pass, National City, San 
Diego, and Escondido, im San Diego County; Oak Springs, 
Sehain’s Ranch, Fuller’s Mill, Poppet Flat, Vandeventer Flat, 
Kenworthy, and Hall Grade, near Cabazon, in the San Jacinto 
Mountains, and Cabazon, Banning, and Riverside, in Riverside 
County; Santa Ana, in Orange County; Sanvenoska, Clarke’s 
Ranch, and Santa Ana Canon, in the San Bernardino Mountains, 
and Colton, Grapeland, and Ontario, in San Bernardino County ; 
and Claremont, mouth of San Gabriel Canon, and Sierra Madre, 
in Los Angeles County. 
A list of specimens showing an intergradation with P. blain- 
ville: frontale follows : 
List oF SPECIMENS SHOWING AN INTERGRADATION BETWEEN Phrynosoma 
blainvillet blainvillei AND Phrynosoma blainvillei frontale 
Museum 
number Sex Locality Collector 
851 g Pasadena, Los Angeles County, J. Grinnell 
California 
2 Aroyo Seco, Pasadena, California J. Grinnell 
2 Pasadena, Los Angeles County, J. Grinnell 
California 
2412 io) Pasadena, Los Angeles County, H. L. Bryant 
California 
2413 J jun. Pasadena, Los Angeles County, H. L. Bryant 
California 
2478 J jun. East Pasadena, Los Angeles H. L. Bryant 
County, California 
2479 J jun. East Pasadena, Los Angeles H. L. Bryant 
County, California 
2480 2 East Pasadena, Los Angeles FP, Davis 
County, California 
2 East Pasadena, Los Angeles R. N. Bryant 
County, California 
9 jun. East Pasadena, Los Angeles R. N. Bryant 
County, California 
3 Milliard’s Cafon, near Pasadena, R. N. Bryant 
Los Angeles County, California 
855 rad Tuhunga Valley, Los Angeles J. Grinnell 
County, Califorma 
3 Sierra Madre, Los Angeles County, C. Camp 
California 
