18 Transactions of the Academy of Science of St. Louis 
after the snake was removed the lizards were restless and seem- 
ingly had not recovered from their fright, as most of them 
were climbing about the top of the cage. 
Two half-grown specimens in the Stanford University col- 
lection, both having head and body lengths of about 70 mm., 
were taken from the stomach of a racer (Coluber), according 
to the label enclosed with them. Another from Chalk Peak, 
Monterey County (Mus. = nse no. 7236) having a head 
and body length of 82 mm. wa taken from the stomach of 
a California racer (Masteaphis ie: 
Miller (1931: 200) lists Gerrhonotus scincicauda (probably 
referring to the present form) as one of the reptiles used for 
food by the shrike, Lanius ludovicianus. 
On May 1, 1932, at Daly City, I found two mating pairs of 
Pe et Alligator Lizards, Individuals of this form were 
unusually active and were moving about in the open on this 
te. any were seen during the day and they were much 
more in evidence than San Francisco Alligator Lizards which 
on other occasions have been found to be the more abundant 
in this locality. The majority of those seen were adult males. 
Evidently the breeding season is limited to a short period at 
this time of year. 
Neither of the pairs was copulating when they were found, 
at about noon. In each case the male held the head of the 
female across the temporal and occipital region of one side, in 
his jaws. (See pl. 4, fig 2.) When first seen the lizards of 
th pairs were walking about in short grass, stopping at inter- 
vals. Later they moved beneath small bushes where they be- 
came quieter. 
A large adult male, which was caught during the course of 
the afternoon, was released and started in the direction of one 
of the mating pairs, from a distance of several yards. The 
pair was near a hole at the base of an outcropping of rock 
and the lizard which was liberated made for this hole. When 
first set free, it made a short run, then progressed more slowly, 
gliding through the grass with occasional pauses. It did not 
the other lizards, but as it approached, the mating male 
oun signs of anger by inflating his body, rolling his eyes, 
and twitching his tail. When the intruding male had come 
within a few inches, the other suddenly released the female, 
ran at him, seized him by the side, and bit viciously. The 
attacked male eed and for a moment the two rolled about, 
writhing and twisting as they bit one another. They separated, 
and the male which had made the attack ran back into the 
mouth of the hole down which the female had meanwhile Se 
appeared. The other seemed bewildered and ran about ai 
