Pomona College, Claremont, California 145 
the median white stripe. The lower margin of the abdomen was 
very dark gray. The legs were light brown with dark brown at the 
upper margins of all except the coxa. The palpi were light brown 
except the last joint which was dark brown. At forty-one days of 
age the cephalothorax was a dark brown gray ground color with 
a black broad stripe around each margin, the legs were dark gray 
brown with darker gray at each upper margin. The abdomen 
was black except for a median white stripe which went from the 
upper margin three-fourths of the way down and a stripe that 
extended down around the margins the same distance. From this 
time on until the last moult, the body became suffused with black, 
the space left on the abdomen which had been white was filled with 
red, and the males were distinct from the females. Some of the 
white spaces never filled with red but became black. Comstock 
states in his Spider Book, 1910, that it is known that the immature 
females are often marked like the mature males, but this was not 
found to be so in the artificially raised families which were grown in 
the laboratory. The red marking and color did not come until late 
in the last moults. 
Lycosa sp. Plate VI 
The next large group studied were the Lycoside. The genus 
and species studied were Lycosa sp. The adult female and male 
were alike in color and pattern. The cephalothorax was dark brown 
with a wide median light brown stripe extending from the anterior 
eyes to the lower margin. The space between the eyes was shiny 
black. At the base of the sides of the cephalothorax were two light 
brown spots. The abdomen was black brown with uneven spots of 
light brown on the basal half and in the dorsal half were two hori- 
zontal light brown stripes. The legs were gray brown with dark 
bands on all the joints except the tarsus and metatarsus. The young, 
when emerged, have a dirty gray cephalothorax with a wide light 
brown median stripe extending from the second row of eyes to 
the base of the cephalothorax. The color around all the eyes is 
black. The abdomen is a dirty gray with a few dark spots on the 
median line. The abdomen and cephalothorax are covered with 
long black hairs and a few white ones. The legs are light yellow 
