14 Transactions of the Academy of Science of St. Louts 
probably perish from lack of moisture. The female would prob- 
ably be unable to dig her own burrow for the eggs because of 
her feebly developed legs. 
In 1933, in the Rogue River Valley, mating pairs were found 
on May 31, June 4, June 8, and June 12, respectively. Possibly 
the breeding season was delayed because of the late spring. 
During May, 1931, two mating pairs were seen, and in 1934 
mating pairs were seen on May 14, and May i 
Although the following observations on the breeding habits 
of this form were made before this study was begun and no 
notes were taken at that time, they are perhaps of sufficient 
interest to record here in so far as they can be remembered. 
(see pl. 3, fig. 1) and was kept in a spacious outdoor cage. 
She was fed regularly with grasshoppers and other insects. After 
several weeks her body had become much distended with eggs. 
A box turtle (Terrapene ornata), which also was kept in the 
cage, had made a burrow in a sand pile and in this the lizard 
spent most of the time, coiled in a small side branch about a 
foot beneath the surface of the ground and two feet or more 
in from the entrance. Thirteen eggs were deposited in the bur- 
row during the first week of August. They were arranged close 
together and in a single layer, partly covered with sand. They 
were white, and oval in shape with tough leathery shells, and 
resembled the eggs of Scslesords | in appearance except for their 
larger size. They contained embryos which were still in an 
early stage of development, occupied less space than the yolk, 
and were not yet recognizable as lizards. 
Ove number of years that I have been familiar with 
alligator reeks in Rogue River Valley I have each year first 
noticed newly hatched young in September, therefore a month 
or more evidently is necessary for the embryos to complete 
their development after the eggs are laid. 
Red-backed Alligator Lizard 
Gerrhonotus multi-carinatus multi-carinatus 
In different parts of its range this form occupies a variety 
of habitats. It inhabits thickets of underbrush in groves of 
trees of the bottomlands along rivers in the Sacramento Valley 
(pl. 3, fig. 2), the digger pine and yellow pine belts in the 
northern Sierra foothills, oak forests, chaparral, and, in the 
coastal area, sand dunes and rocky, treeless hills. It occurs 
the Transition and the Lower Sonoran 
n the warmer part of the range of this subspecies hiberna- 
tion seems to be incomplete, but farther north and at high alti- 
tudes it probably lasts for several months. Grinnell, Dixon, 
