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 brown, the abdomen gray without any markings. The epigynum (figs. [352, 353]) has a long, slender, flexible process on the outer edge that extends backward to the middle of the abdomen, 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 gray or black, with five or six transverse light markings, usually in the male and often in the female broken into pairs of spots [(fig. 355)]. The abdomen is high in front and a little pointed behind [(fig. 354)]. The epigynum (figs. [356, 357]) has two flexible processes, one over the other, extending backward, the tip of the inner one extending beyond the outer. The tarsus of the male palpus [(fig. 356)] is short and truncated, with its tube twisted in a circle around the end. It lives under leaves in winter.

THE GENUS ERIGONE