The Lizards of Kansas 61 
was greater. One of these specimens was taken from 
under a rock in company with a medium-sized bull snake, 
Pituophis sayi, and two small sand snakes, Tantilla gra- 
cis. In Ottawa County these Sonoran skinks were very 
active in a place called ‘‘Rocky Fern,’’ an area of rocks, 
sand, and sparse vegetation. Here they were found asso- 
ciated with Cnemidophorus sealineatus which was pres- 
ent in large numbers. 
This species has been collected in Kansas from March 
27 to October 9. It is one of the earliest lizards to come 
out of hibernation in the spring, and perhaps the earliest 
to hibernate in the fall, since fall collecting, as a rule, 
yields very few of them. The specimen which was taken 
on October 9 (1925), was buried about ten inches in the 
earth beneath a large rock, and was inactive when taken. 
During the course of this study several copulation 
dates have been recorded for this species, namely, May 
8, 1926; May 17, 1926; June 13, 1927; and June 15, 1927. 
The first two records are based on the same pair of in- 
dividuals, but the last two are based on one female and 
two males. The copulation upon the second date lasted 
about four minutes. The act was preceded by a series of 
maneuvers, which ended in the grasping of a liberal fold 
of skin from the side of the female’s neck, by the male, 
and the twisting of the latter’s body beneath that of the 
female. 
Eggs have been laid on June 18, June 26, and July 1, 
in Kansas. A female which was collected at Manhattan, 
Riley County, Kansas, on April 27, 1927, laid the fol- 
lowing eggs in captivity at the Biological Station of the 
University of Michigan, Cheboygan County, Michigan: 
July 1, two; July 2, five; July 3, one; and July 7, one. 
This makes a series of nine eggs which were laid in the 
period of one week. The eggs were white in color when 
