1917} Grinnell-Camp: Amphibians and Reptiles of California 153 
RanGE.—Southern San Joaquin Valley (Tulare basin), and Car- 
rizo Plain, San Luis Obispo County. Occurs north to Livingston, 
Merced County (MeLain, Crit. Notes Coll. Reptiles Western U. S., 
1899, p. 2); east to Poso, Bakersfield, and Pampa, in Kern County 
(Stejneger, N. Amer. Fauna, 7, 1893, p. 170) ; south to 5 miles north 
of Rose Station (Stejneger, loc. cit.), and to San Emigdio Plains 
(Mus. Vert. Zool.), Kern County; then, on Carrizo Plain, west to 
Painted Rock, San Luis Obispo County. Restricted to the Lower 
Sonoran life-zone. Inhabits level valley floors. 
Crotaphytus collaris baileyi Stejneger 
Bailey Collared Lizard 
OriginaL Description.—Crotaphytus baileyi Stejneger, N. Amer. 
Fauna, 3, 1890, pp. 103-105, pl..12, fig. 1. 
TypE Locaniry.—Painted Desert, Little Colorado River, Arizona. 
Synonym.—Crotaphytus collaris. 
Common Name.—Bailey Leopard Lizard. 
RANGE.—Of interrupted distribution on the southeastern deserts, 
occurring north through the Inyo region to Deep Spring Valley slope 
of White Mountains, 5600 feet altitude, Inyo County (Stejneger, N. 
Amer. Fauna, 7, 1893, p. 166). Has been taken west to 5 miles north 
of Kernville, Kern County (Mus. Vert. Zool.) ; to Lytle Creek, San 
Bernardino County (Van Denburgh, Proe. Calif. Acad. Sei., ser. 4, 
3, 1912, p. 147); to Hall Grade, near Cabezon, Riverside County 
(Atsatt, Univ. Calif. Publ. Zool., 12, 1913, p. 33); to Palm Canon, 
San Jacinto Mountains, Riverside County (Atsatt, loc. cit.) ; and to 
Mountain Spring, eastern San Diego County (Cope, Ann. Rep. U.S. 
Nat. Mus., 1898 [1900], p. 252). Not known from region of Colorado 
River south of near Blythe Junetion, in Riverside County (Camp, 
Univ. Calif. Publ. Zool., 12, 1916, p. 521). Occurs in the Lower and 
Upper Sonoran life-zones. Restricted to rocky situations. 
Sauromalus ater Duméril 
Chuckwalla 
OriGInaAL DerscripTion.—Sauromalus ater Duméril, Arch. Maus. 
Hist. Nat., 8, 1856, pp. 536-538, pl. 23, figs. 3, 3a. 
Type Locauiry.—Unknown. 
Synonym.—Luphryne obesus Baird, Proe. Acad. Nat. Sei. Phila., 
