much difference in size between the sexes, but they are often very differently colored, and the males do not have the cribellum and calamistrum, or have only rudiments of them. [Illustration: FIG. 472. Web of Dictyna in the corner of a window pane.] [Illustration: FIG. 473. Web of Dictyna on the end of a twig.] Some species live on walls and fences, making large webs that become conspicuous from the dust which they collect. Others prefer the tops of plants like stiff grass and the tops of golden-rod and spiræa. Others, like _volupis_ (fig. 474), prefer leaves and the ends of growing branches. The webs are usually irregular, but sometimes are nearly round and formed by threads radiating from the spider's hole, crossed irregularly by other threads (fig. 471). [Illustration: FIGS. 474, 475, 476, 477, 478. Dictyna volupis.--474, female. 475, male. Both enlarged eight times. 476, side of male. 477, front of head of male enlarged sixteen times, showing curved mandibles. 478, palpus of male.] $Dictyna volupis.$--This species and _frondea_ are brighter colored and more slender than _muraria_ and _volucripes_ (fig. 484) and live among the leaves of bushes. The female _volupis_ has the legs pale, almost white, and the cephalothorax light brown, darker at the sides and light on the head (fig. 474). The abdomen is yellow in the middle and brown, sometimes red, at the sides. The middle yellow portion forms a regular figure differing much in different individuals. The male is quite differently colored. The cephalothorax, which is larger, is bright orange brown, without much difference between the head and the sides (fig. 475). The legs are light orange, darker than those of the female. The abdomen is dark reddish brown, sometimes over the whole back, but usually with a yellow irregular middle spot smaller than that of the female. The ends of the male palpi are dark colored and as large as the spider's head (fig. 475). The hairs are very fine and light colored and do not modify the color as much as they do in the brown species. The length of _volupis_ is not over an eighth of an inch. The abdomen is oval and not as wide or high as in _volucripes_ and _muraria_. The head of the male is high, and the mandibles almost as long as the cephalothorax (fig. 476). The lower half is turned sharply forward and flattened out at the end. The mandibles are light orange brown, so that their shape is more readily seen than in the dark species. The tooth on the front of the base of the mandibles is very large in this species (fig. 477). [Illustration: FIGS. 479, 480, 481. Dictyna frondea.--479, markings of the abdomen enlarged eight times. 480, cephalothorax and palpus of male. 481, palpus of male.]