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SPIDERS THOMISIDiE Spiders with eight eyes, situated in two transverse rows, two tarsal claws and anterior spinners close together at their base. Maxillae not impressed. The crab-like shape and side- long movements of these spiders are their chief characteristics, enabling them to be easily distinguished from the more elongate Drassida; and Clubionida. 4. Xysthus cristatus (Clerck) 6. Tibellus oblongus (Walckenaer) Luton (F.P.S.). Luton (F.P.S.) 5. Philodromus aureolus (Clerck) Luton (F.P.S.) ATTIDM The spiders of this family may be recognized in a general way by their mode of pro- gression, consisting of a series of leaps. More particularly they may be known by the square shape of the cephalic region and the fact that the eyes are arranged in three rows of 4, 2, 2, the centrals of the anterior row being much the largest. Otherwise the spiders are simply specialized Clubionids with two tarsal claws and other minor characters possessed in common with other members of this family. 7. Salticus scenicus (Clerck) Woburn Abbey (Lord Tavistock) ; Luton (F.P.S.) PISAURIDjE Spiders with eight eyes in three rows of 4, 2, 2 ; the small anterior eyes being sometimes in a straight line, sometimes recurved and sometimes procurved. Those of the other two rows are situated in the form of a rectangle of various proportions and are much larger than the eyes of the anterior row. The tarsal claws are three in number. Pisaura runs freely over the herbage, carrying its egg-sac beneath the sternum ; while Dolomedes is a dweller in marshes and swamps. 8. Pisaura mirabUh (Clerck) Woburn Abbey (Lord Tavistock) ; Luton (F.P.S.) Known also as Dolomeda, or Ocya/e, mirabilis. lycosid^: The members of this family are to be found running freely over the ground, and carry- ing the egg-sac attached to the spinners. Many of the larger species make a short burrow in the soil and there keep guard over the egg-sac. Eyes and tarsal claws as in the Pisaurida, with slight differences. 9. Lycosa ruricola (De Geer) "• Pardosa lugubris (Walckenaer) Luton (F.P.S.) Woburn Abbey (Lord Tavistock) ; Luton (F.P.S.) 10. Pardosa amentata (Clerck) 12 . Pardosa annulata (Thorell) Luton (F.P.S.) Luton (F.P.S.) AGELENIDjE Spiders with eight eyes, situated in two straight or more or less curved transverse rows. Tarsal claws, three. The species of this family spin a large sheet-like web, and construct a tubular retreat at the back of it, which leads to some crevice amongst the rocks or in the herbage, or in the chinks in the walls of outhouses and barns, wherever the various species may happen to be found. The habits of Jrgyroneta, the water spider, are however quite different. The posterior pair of spinners is much longer than the others in the more typical genera of this family. 13. Tegenaria parietina (Fourcroy) 14. Tegenaria derhami (Scopoli) Woburn Abbey (Lord Tavistock) Luton (F.P.S.) Abundant in the London district. Known A very common species everywhere, also as T. guyonii and T. domestica. I 89 12