The web (fig. 222) is flat and shaped according to the surrounding objects to which it is fastened, with a tube at one side in which the spider hides. The eggs are laid in August and September in a flat cocoon, attached by one side in some sheltered place and covered with silk, often mixed with dirt. Most of the adult spiders die before winter, and females are often found dead on or near their cocoons. The young hatch in the winter and leave the cocoon early in the spring, and soon begin to build their webs among the short grass. The webs become more distinct when covered with dew, but, though too transparent to be seen at other times, they remain in the same places throughout the summer and are repaired and enlarged as the spider grows. If, however, the web should be destroyed, the spider is able in one day to make a new one as large as the old, but thin and transparent. The web contains many long threads crossing it from one side to the other and nearly parallel, and these are crossed in all directions by finer threads (fig. 226). The long threads are spun from the lower spinnerets, the upper pair being held up over the back, out of the way. The fine threads are spun from the upper spinnerets, which are swung from side to side as the spider moves along. There is nothing adhesive about the web. It serves merely as a clearing where insects may alight to rest and the spider may have a good chance to run after them. Where the web is made under plants or rocks a great number of threads are carried upward from it, which may help in stopping insects (fig. 227), as they do in the webs of Linyphia. (See p. 135.) [Illustration: FIGS. 228, 229. Tegenaria derhamii.--228, female enlarged four times. 229, front of head.]