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 lor 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 tilled 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 V 1 



The next large group studied were the Lycosidae. 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 eves 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 tew white ones. The legs are light yellow 



