Ashy Horned Lizard

Phrynosoma calidiarum, (Cope)

Colouration: Ashy-gray, with wavy black cross-bars. Abdomen immaculate white; on the chin and at the base of the tail are a few black spots.
Dimensions: The measurements of an adult male, from the Gila Desert, are given:
Distribution: Appears to be very rare. The type specimen was taken in Death Valley, eastern California. The writer received a specimen from the Gila Desert, south of Phoenix, Arizona.

The ear drums are not visible, being covered with fine, granular scales. Among those species that follow, all of which exhibit this character, the present one may be recognised by the single row of marginal, spiny scales.

Back quite spiny; head spines well developed, particularly the central horns, which are directed quite sharply upward. Upon gross examination this resembles the Texas Horned Lizard, P. cornutum. The central portion of the chin is covered with small scales, of uniform size. The scales of the abdomen are perfectly smooth.

Total Length . . . . . 4 1/8 inches.

Length of Tail . . . . . 1 1/4 inches.

Greatest Width of Body . . . . . 1 1/2 inches.

Length of Central Horns . . . . . 1/4 inches.