Pomona College, Claremont, California 



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large flat cephalothorax oi the adult. rhe cephalothorax was 

 yellow b row n with a line oi green on the sides oi the thoracic por- 

 tion oi the cephalothorax. rhe pattern along the median lino oi 

 the cephalothorax is the same as that found in the young oi the 

 same age in the other specimen oi Peucetia viridans described. I ho 

 cephalic portion ot the cephalothorax is yellow brown, the eye space 

 is brown. Hie abdomen is brownish green with a slight beginning 

 ot a folium in red. I he legs were yellow green with darker green 

 spots at the upper margin ot each joint. The trochanter, femur, 

 tibia and tarsus have a varying number ol black spots. Alter one 

 week there was another moult. The legs and palpi had not 

 changed except in size, I he cephalothorax had a little more green, 

 the upper part \er\ bright red at the center and shading down to 

 the gray green ot the abdomen. The folium was outlined in \\\\, 

 the upper part \ er\ bright \\\\ at the center and shading down to 

 a \ er\ light red and green in the lower part ot the abdomen. The 

 spinnerets were dark, covered with black hairs. In a week an- 

 other moult took place. I lie cephalothorax was lighl green with 

 a band ot dark on either side. I he eye space was dark brown. 

 The pattern along the median hue was in dark green. rhe abdomen 

 was dark green, the irregular pattern along the median part 

 oi the abdomen was in light green brown. The legs were light 

 green, the femur light yellow, the spots being at the base of 

 the spines on all the joints except the trochanter. Alter the next 

 moult which took place in two weeks, the young were like the 

 adult in everything but size and sex differentiation. Whether this 

 form could be called a variety or not could not be said, but cer- 

 tainly in development ot the young and in the adult itself there is 

 a great difference between it and the desscribed Peucetia viridans, 

 The tune when each was collected, and the difference in location 

 may have influenced the color and color development, but it esems 

 highly improbable that it could have affected the young as well. 



Aranea gemma McCook, Plate IV 



rhe next group studied was the Aranea gemma. The color pat- 

 tern ol the adult was: The cephalothorax was dark brown, almost 

 black and covered with light yellow hairs. I he abdomen was a 



