THE ATTID^E 



6l 



very distinctly marked, and the palpi white. On some indi- 

 viduals the white marks are more definite than on others, the 

 gray ground having but few white scales mixed with it. In 

 others yellow and white scales are 

 largely mixed with the gray, and so 

 the contrast with the white spots is 

 less. The males (fig. 156) differ but 

 little in size, color, or markings from 

 the females, but the male mandibles 

 are much larger and extend horizon- 

 tally in front of the head, sometimes 

 two-thirds as long as the cephalotho- 

 rax. This is a common European, 

 as well as American, spider. It is 

 occasionally found on the ground or 

 on plants, but commonly on and 

 ar^out houses. 



Marptusa familiaris. — This is another 

 common species on fences and the out- 

 side of houses (fig. 157). When full 

 grown it is half an inch long. The 

 whole body is much flattened, and 

 both the cephalothorax and abdomen 

 are widened in the middle. The 

 cephalothorax is rounded at the sides 

 and three-quarters as wide as long, 

 and the abdomen is half as wide as 

 it is long. The legs are long and 

 stout, the fourth pair one-half longer 

 than the abodmen. 



The general color is gray, with long 

 gray and white hairs. The cephalothorax has a dark brown 

 band along the edge on each side, which is larger and darker in 



Fig. 157. Marptusa familiaris. 

 Female enlarged six times. 



