THE COMMON SPIDERS 



down at the ends. The maxillae are straight, with the sides 

 nearly parallel, and the labium is shorter than wide. The 

 males are usually smaller than the females and have the red 

 spot larger. These spiders live among stones in dry open 

 places. They are easily alarmed and move very rapidly. The 

 flat, parchment-like cocoons found on stones are probably made 

 by this species. 



Geotrecha bivittata. — The same size as G. crocata but much 

 lighter colored, and with two white stripes across the abdomen 

 (fig. 23). The cephalothorax is a little narrower behind than 



it is in crocata. Its color varies from 

 orange to dark brown. The femora of 

 all the legs are striped lengthwise with 

 brown and yellow. The hind legs are 

 brown, with a little yellow on the upper 

 side of the patella and tibia. The other 

 legs are yellow, sometimes with brown 

 stripes on the under side. The white 

 marks on the abdomen extend under- 

 neath halfway to the middle line. The 

 sternum and under side are light brown. 

 It lives under leaves at all seasons. 



»^ Micaria longipes or aurata. — A quarter of an inch long or less, 

 and resembling an ant both in size and color (fig. 28). The 

 cephalothorax is twice as long as wide, and only a little widened 

 in the middle. It is highest in the middle, curving downward 

 at both ends. The front row of eyes (fig. 25) is nearly straight 

 and the upper row curved, with the middle eyes highest and 

 the eyes all farther apart than in the lower row. The abdo- 

 men is one-half longer than the cephalothorax and about as 

 wide, blunt at both ends and drawn in a little at the sides and 

 above at a point a third of its length from the front. The 

 legs are long and slender, the fourth pair longest. The colors 



Fig. 



Fig. 24. 



Geotrecha bivittata. — Upper 

 and under views of female 

 enlarged four times. 



