146 Journal of Entomology and Zoology 
brown with black hairs. At the age of two weeks the cephalothorax 
was a.dirty brown, the sides had a small black line along the edge, 
there was the same wide median light brown band extending from 
the second row of eyes down to the lower margin and on either 
side of this band was a large gray band. The space around the eyes 
was black. The abdomen was a dark gray ground color with a light 
brown median band broken by lines and spots of gray. The hairs 
were long and black, some of the hairs on the abdomen being three- 
fourths as long as the spider. The legs and palpi were light brown 
with faint gray band on all joints except the coxa, tibia, tarsus and 
metatarsus. At three weeks of age the abdomen was the only thing 
changed. It had changed to that of the adult in color and pattern. 
The legs, palpi and cephalothorax were the same as at two weeks of 
age. At the age of one month the Lycosa young were miniatures of 
the adult. They were about one-tenth the size of the adult at 
this age. 
Phidippus sp. Plate VII 
The Attidae studied were large undertermined desert forms of 
the genus Phidippus and taken in the winter from under rocks. The 
adults had black cephalothorax with a red spot between the posterior 
eyes. The abdomen was a reddish brown ground color with a gray 
stripe around the upper margin, and a gray folium at the lower half 
of the abdomen. The young were very hard to raise and lived only 
a week in some cases. One set emerged in the winter and lived only 
a few days, but from another egg case, young came forth with arti- 
ficial aid, after being kept seven months. The cephalothorax of 
the newly emerged was dark green, the abdomen dark green with 
two lighter green spots and lines surrounded by black on the for- 
ward portion of the abdomen and four dark horizontal lines at 
the lower part of the abdomen. The coxa and trochanter of the 
legs were gray green, the rest of the joints were orange yellow. 
Bothriocyrtum Californicum. Plate VIII 
Of the family Aviculariidae the trapdoor spider was observed. 
The adult has a chocolate brown cephalothorax with a deeper choco- 
late brown on the abdomen, the legs being the same color. The 
