$Linyphia communis.$--A little smaller than _marginata_, with legs a little shorter. The colors are the same light yellow and purplish brown, but the markings are distinctly different. The cephalothorax is uniform light brownish yellow. The middle stripe of the abdomen extends the whole length of the upper side and connects with several narrow brown stripes that extend down the sides (fig. 323). The abdomen is more regularly oval and less enlarged behind than in _marginata_, but the upper part extends back farther over the spinnerets. The under side is dark brown. The male is smaller than the female, with the head higher and the abdomen narrower. The palpi of the male are unusually small for the genus (fig. 324). The web of _communis_ (fig. 322) consists of a horizontal sheet, convex below and supported by threads above. Below this, about an inch distant, is another sheet of web. Insects flying between the upper threads fall down to the sheet below and are taken through by the spider, as they are in the dome of _marginata_. [Illustration: FIG. 325. Web of young Linyphia mandibulata in short grass near the ground. About the real size.] [Illustration: FIGS. 326, 327, 328, 329. Linyphia mandibulata.--326, markings of abdomen of female enlarged eight times. 327, side of abdomen. 328, cephalothorax and palpus of male. 329, mandibles of male.] $Linyphia mandibulata.$--A little larger than _L. communis_ and _marginata_, with the head longer and more distinct from the thorax, and the abdomen larger and flattened on the top (figs. 326, 327). The length is about a sixth of an inch. The cephalothorax is dark orange brown, and the legs a lighter shade of the same color. The length of the legs is about as in _communis_, shorter than _marginata_ and _phrygiana_. The abdomen is dark brown, often almost black, with several white spots, usually two across the front end and several others around the sides (fig. 326), sometimes forming a complete light stripe around the middle. In the males the abdomen is narrow, and the only markings are usually the two spots on the front end. The cephalothorax of the male is long and narrow; the head is extended forward, and the mandibles inclined backward toward the maxillæ. The mandibles are more than half as long as the cephalothorax and widened at the ends, with four teeth on the inner corner (fig. 329). On the inner side of the mandibles, near the middle, is a large blunt tooth. The webs are flat and near the ground, on short grass and leaves and across little hollows in the sod (fig. 325). The webs are not as large as those of _phrygiana_, and the spider has no nest, but stands always in the web and drops suddenly when alarmed. It lives all over the eastern part of the country and resembles closely the _Linyphia pusilla_ of Europe. [Illustration: FIGS. 330, 331. Linyphia coccinea.--330, female. 331, male enlarged twelve times.]