$Linyphia (Helophora) insignis.$--An eighth of an inch long, as long as _socialis_, but more slender. The cephalothorax and legs are light yellow, and the abdomen gray or white, sometimes without markings and sometimes with gray stripes at the sides and two or three pairs of gray marks across the hinder half (fig. 348). The cephalothorax of the male is twice as wide across the middle as at the head. The legs are without markings. The epigynum (fig. 350) is long and straight, extending backward close to the abdomen for half its length. The tibia 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. [Illustration: FIGS. 351, 352, 353. Linyphia concolor.--351, end of palpus of male. 352, side of epigynum. 353, epigynum from below.] $Linyphia (Diplostyla) concolor.$--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. [Illustration: FIGS. 354, 355, 356, 357, 358. Linyphia nigrina.--354, side of male. 355, markings of back of female. 356, end of palpus of male. 357, 358, epigynum.] $Linyphia (Diplostyla) nigrina.$--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 [Illustration: FIG. 359. Web of Erigone dentigera among stems of grass close to the ground. About the real size.]