This spider is common in winter under stones and under leaves. In summer it makes webs close to the ground, among short and thin grass and moss. [Illustration: FIG. 252. Hahnia cinerea, enlarged sixteen times.] $Hahnia cinerea.$--About a twelfth of an inch long; much smaller than _bimaculata_ (fig. 251). The color is dark gray, the cephalothorax and legs brownish, and the legs a little lighter at the ends of the joints. The abdomen has a row of angular light spots in the middle. The spinnerets are in not quite as straight a line as in _bimaculata_, the outer pair being a little higher and farther behind the next. The tracheal opening is not as far forward as in _bimaculata_, being nearer the spinnerets than the epigynum. The male palpi have the appendages of patella and tibia longer than in _bimaculata_, and softer and more curved. They are found under stones and leaves. THE THERIDIDÆ [Illustration: FIG. 253. Webs of Theridium in a fog, on the tops of burnt bushes. Half the real size. These webs are too fine to be noticed in dry weather.] [Illustration: FIG. 254. Webs of Theridium in a fog, on the tops of golden-rod. One-third the real size.] The Therididæ are the builders of the loose and apparently irregular webs in the upper corners of rooms, in fences and among rocks, and between the leaves and branches of low trees and bushes. They are generally small, soft, and light-colored spiders, with the abdomen large and round and the legs slender and usually without spines. The eyes are all about the same size and in two rows across the front of the head, with the lateral eyes of the two rows near together and often touching each other. The mandibles are weak and without teeth at the end. The maxillæ are pointed at the end and turned inward toward each other. Most of the Therididæ live always in their webs, hanging by their feet, back downward. The webs have in some part a more closely woven place under which the spider stands, sometimes in the middle of the web, sometimes in a corner out of sight. Where the spider's usual standing place is without other shelter, it is often concealed by pieces of leaves or sand carried into the web by the spider, and sometimes made into a tent. The outer part of the web is usually loosely made in large meshes, but is sometimes in a distinct sheet spreading from the nest and held out by threads in all directions. The cocoons are round and soft and hang in the web, several being made in the same season by one spider. [Illustration: FIG. 255. Web of Theridium tepidariorum in a dark corner. Half the real size.] Several of this family, like Spintharus and Euryopis, have the abdomen smaller and flatter than usual and the fourth legs longer, so that they are better fitted for walking. They are found on plants, and little is known about their webs. THE GENUS THERIDIUM