$Uloborus plumipes.$--Uloborus makes a round web, like those of the Epeiridæ, and when hanging in it resembles a Tetragnatha. The adult female is about a quarter of an inch long, and narrow like Tetragnatha. The cephalothorax is low in front and extends forward, in the middle, beyond the mandibles, and the back part is widened and swelled up on each side where the abdomen extends over it (fig. 494). The abdomen is slightly notched in front and covers the cephalothorax a quarter of its length. The abdomen is widest and thickest in the front third and has there a pair of humps. The eyes are in two rows, those of the upper row largest and on the top of the head, with the lateral pair farthest back. The front row are on the edge of the head close to the mandibles. The first pair of legs is the longest and is twice as long as the second. It has at the end of the tibia a brush of long coarse hairs. The colors are various shades of brown, from very light to almost black. The cephalothorax has a light middle stripe. The legs have the joints light in the middle and black at the ends, except the first leg, which sometimes has the tarsus and metatarsus white, and the rest of the leg dark brown. The fourth metatarsus is curved in on the outer side, where the calamistrum is placed. The male is smaller than the female, the legs are longer, the abdomen is smaller and less distinctly humped, the first legs do not have the brushes on the tibia, and the fourth legs do not have the calamistrum. The webs resemble those of Epeira and Tetragnatha, and are horizontal or inclined. They are often left unfinished, with several turns of the wide temporary spiral still in them (fig. 495). Sometimes there are zigzag lines of loose silk across the center or in a middle spiral, and when the eggs are laid the long cocoons are fastened in a line of silk across the web (fig. 497). When this is done the center of the radii of the web is usually at the upper part, instead of in the middle, and the whole web is one-sided. It is found all over the country, usually in shady woods, in bushes, or in the lower branches of trees, especially in the lower dead branches of pines. [Illustration: FIG. 497. Web of old Uloborus. The spider is in the middle and at the left are three egg cocoons. One-third the real size.] [Illustration: FIG. 498, 499. Hyptiotes cavatus.--498, female enlarged eight times. 499, end of hind leg, showing calamistrum.]