THE LINYPHIAD.'E 



147 



of the palpal organ has a short, pointed process, extending 

 directly outward from the side (fig. 348). They live in flat 

 webs among low plants. 



Linyphia (Diplostyla) concolor. — About a twelfth of an inch 

 long, a little smaller than nigrina, with long slender legs, and 

 the abdomen slightly pointed toward the spinnerets and not 

 much larger than the cephalothorax. The color is light yellow 



Figs. 354, 355, 356, 357, 358. Linyphia nigrina. — 354, side of 

 355 male. 355, markings of back of female. 356, end of palpus 



of male. 357, 358, epigynum. 



brown, the abdomen gray without any markings. The epigy- 

 num (figs. 352, 353) has a long, slender, flexible process on the 

 outer edge that extends backward to the middle of the abdo- 

 men, and under it is another shorter one not easily seen. The 

 tarsus of the male palpus (fig. 351) is longer and more tapering 

 than that of nigrina. Adults of both sexes are common under 

 leaves in winter all over the northern part of the country. 



Linyphia (Diplostyla) nigrina. — A tenth of an inch long. 

 Cephalothorax and legs light yellow brown. Abdomen dark 



