29. HENSHAW NIGHT LIZARD. Xantusia henshawi. 
Appears to be rare. So far only found in three or four lo- 
calities on the western slope of the mountains. Not reported 
from any place outside of this county. Found in crevices of 
rocks. Crepuscular and nocturnal. 
Family TEIID. 
30. DESERT WHIP-TAILED LIZARD. Cnemidophorus 
tigris. 
Cumin ts the Colorado Desert. Insectivorous. 
31. STEJNEGER WHIP-TAILED LIZARD. Cnemidophorus 
tigris stejnegeri. 
Locally common in the mountains and west to the sea. 
32. BELDING ORANGE-THROATED LIZARD. Cnemido- 
phorus hyperythrus beldingi. 
Coast region not common. 
Family SCINCID/. 
33. WESTERN SKINK. Plestiodon skiltonianum. 
Usually found lying under boards or stones or among dead 
leaves. Young individuals have bright blue tails. Principally 
nocturnal. Insectivorous. 
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Suborder SERPENTES. Snakes. 
Snakes are born with lungs. Limbs are absent. The body 
is covered with scales. Snakes follow many modes of life; ter- 
restial, arboreal, subterranean, aquatic; diurnal, nocturnal or 
crepuscular. Progression may be straightforward, by movement 
of the broad scales of the under surface; by pushing with the 
back side of the curves of the body and tail; or by a combination 
of both methods. In cold climates snakes hibernate in winter; 
in hot climates <estivation may take place in the hotter or drier 
seasons. They are carnivorous. Snakes are usually oviparous, 
but a few species are viviparous. 
Family LEPTOTYPHLOPID. 
34. WORM SNAKE. Leptotyphlops humilis. 
Very rare. Two have been found on the eastern slope of the 
mountains. 
Family BOID. 
35. CALIFORNIA BOA. Rubber Snake. Lichanura roseo- 
fusca. 
Not common. Foothills. : 
36. CALIFORNIA GARTER SNAKE. Thamnophis ordin- 
oides hammondi. 
Common in most parts of the county, near or in water. Food 
insects, tadpoles, small fish. 
