10 



THE COMMON SPIDERS 



The cephalothorax is nearly as wide behind as it is long. The 

 head is about half as wide as the thorax. The eyes (fig. 30) 

 are large for so small a spicier, and cover more than half 



the width of the head. The 



c7 oo 

 00 0(2 



J 



3° 



29 



middle eyes of the upper 

 row are oval and turned ob- 

 liquely, diverging toward the 

 front. The labium is short 

 and the maxillae straight, as 

 in Agrceca and Anyphaena, 

 but wider at the base (fig. 32). 

 The legs are long and slen- 

 der, except the tibia and metatarsus of the 

 first and second pairs, which are twice as 

 thick as the same joints of the other legs 

 and have on the under side two rows of 

 strong spines (fig. 29). The cephalothorax 

 is light yellowish, with a black line on the 

 edge each side, and two light gray stripes. 

 The abdomen is gray, with transverse white 

 markings that vary greatly in size and shape 

 in different individuals. The abdomen is 

 covered with scales that change from grayish 

 green to pink with the motions of the spider. 

 The legs are pale, except the patella and 

 tibia of the first pair, which are black or 

 Figs. 29, 30, 31, 32. Phru- dark gray, with the tip of the tibia white. 



rolithus alarms. — 31, . 



female in a natural posi- The tibia and patella of the second pair are 

 ^Th*S,X£ marked with lighter gray in the same way. 

 eight times. 29, one of It lives among stones in open ground, and 



the front legs to show ._ 



spines. 30, eyes from runs short distances with great swiftness. 



in front. 32, maxillae When ^jjj ft Hes dose tQ a gt w j th the 



labium, and ends of 



mandibles. tibiae drawn up over the back. 



3 2 



