A family resembling the last, but having peculiar spinning-organs, which will be described farther on, Fig. 35. LYCOSIDÆ. The running spiders. Very active spiders, living in open places, and catching their prey without webs. Their legs are long, the hind pair being the longest. The head is high, and the arrangement of the eyes peculiar to the family, Fig. 10. [Illustration: Fig. 10.] ATTIDÆ. The jumping spiders. The body is usually short, and the head square. The arrangement of the eyes is characteristic, Fig. 11, _a_. The two large ones in the middle give these spiders a more animated look than those of other families. The legs are short, and the front pair often stouter than the others. They can walk easily backwards or sidewise, and jump a long distance. Fig. 11 is the common gray jumping spider enlarged. [Illustration: Fig. 11.] [Illustration: Fig. 11 _a_.] THOMISIDÆ. The crab spiders. The body is usually flat, and wide behind. The front two pair of legs are longer than the others, and so bent that the spider can use them when in a narrow crack. Some of them, like crabs, walk better sidewise than forwards. Like the running and jumping spiders, they make no webs for catching food. The eyes are small, and simply arranged in two rows, Fig. 12. [Illustration: Fig. 12.] THERIDIIDÆ. The largest family of spiders. Most of them are small, with large rounded abdomens and slender legs. They live usually upside down, holding by their feet under their webs. They make large cobwebs of different shapes for different species, and depend for food on what is caught in them. To this group belongs the genus _Erigone_, containing a great number of the smallest spiders known. Fig. 13 is the common house _Theridion_ enlarged. [Illustration: Fig. 13.] EPEIRIDÆ. The round-web spiders. Large spiders, with flat heads, and eyes wide apart, and short, round abdomens, Figs. 1, 4. They make webs formed of radiating lines crossed by other adhesive ones in a spiral or concentric loops, Fig. 28. They hang in the web, head downward, or live upside down in a hole near by. CHAPTER II. EATING AND BITING.