12 



THE COMMON SPIDERS 



touch the mandibles. The front row of eyes is nearly straight. 

 The upper row is longer and more curved, with the middle eyes 



highest and farthest apart (fig. 39). 



The abdomen is large in the female, 



widest behind the middle, and a little 



pointed behind. The labium is not 



longer than wide, and the maxillae are 



straight, with the sides parallel. The 



sternum is oval, not so short and wide 



as in pratcnsis. The opening of the 



'^ ^ air-tubes is halfway between the epigy- 



num and spinnerets (fig. 38), instead of 



just in front of the spinnerets, as it is in 



most spiders. The spinnerets are two-jointed. 



The legs are slender and tapering, the fourth 



longest in females and the first in males. The 



cephalothorax has two longitudinal broken 



gray bands. The abdomen has a double row 



of spots in the middle and oblique rows of 



smaller spots each side. The oblique lines 



of spots extend under the abdomen halfway 



to the middle. 



Anyphaena calcarata. — The same size and 

 color as A. iiicerta, with longer legs. The 

 markings are the same in both species. 

 The plainest difference between the females 

 is in the epigynum, the hard and dark parts 

 of which are larger and longer in incerta. 

 Another slight difference is in the shape 

 of the sternum, which in calcarata extends 

 farther between the hind legs (fig. 42). In 

 incerta it is more pointed at the hinder end 

 and shorter (fig. 38). The difference between 



41 



Figs. 37, 38, 39, 40, 41. 

 Anyphaena incerta. — 



37, palpus of male. 



38, under side of fe- 

 male as far forward as 

 end of sternum. 39, 

 eyes from in front. 

 40, female enlarged 

 four times. 41, max- 

 illae, labium, and ends 

 of mandibles. 



