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 SPIDERS 20. Chiracanthium erraticum (Walckenaer). The Roman road, Hoddesdon (F. M. C.). Known also under the name of C. carnifex. 21. Chiracanthium lapidico/ens, Simon. Hoddesdon (F. M. C.). Rare ; an immature specimen only re- corded. Known also as C. nutrix. 1 6. Clubiona corticalis (Walckenaer). Hoddesdon (F. M. C.). 1 7. Clubiona phragmitis, C. L. Koch. Hoddesdon (F. M. C.). 1 8. Clubiona c&rulescens, L. Koch. Box Wood (F. M. C.). The third example only of the adult male recorded in Britain. 19. Clubiona compta, C. L. Koch. Hoddesdon (F. M. C.). ANYPHjENIDJE The spiders of this family resemble those of the Clubionidte in most respects, except that the tracheal stigmatic openings beneath the abdomen are situated about midway between the genital rima and the spinners, and not, as in the last family, immediately in front of the spinners. One species only is indigenous to Great Britain and is very common amongst the foliage of trees in May and June. 22. Anyphtena accentuata (Walckenaer). Hoddesdon (F. M. C.). THOMISID^E 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 Drassidte and Clubionidte. 23. Philodromus dispar, Walckenaer. Hoddesdon (F. M. C.). 24. Philodromus aureolus (Clerck). Hoddesdon (F. M. C.). 25. Philodromus ctespitico/ens, Walckenaer. Hoddesdon (F. M. C.). 26. Tibellus oblongus (Walckenaer). Hoddesdon (F. M. C.). 27. Xysticus cristatus (Clerck). Hoddesdon and other parts of Hertfordshire (F. M. C.). ATTIDJE 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. 36. Neon reticulatus (Blackwall). Hoddesdon (F. M. C.). 37. Attus pubescens (Fabricius). Hoddesdon (F. M. C.). 28. Xysticus ulmi (Hahn). Hoddesdon (F. M. C.). 29. Xysticus luctuosus (Blackwall). Hoddesdon (F. M. C.). A much rarer species than the two first named. 30. Oxyptila praticola (C. L. Koch). Hoddesdon (F. M. C.). 31. Oxyptila trux (Blackwall). Hoddesdon (F. M. C.). 32. Misumena vatia (Clerck). Hoddesdon (F. M. C.). 33. Balticus scenicus (Clerck). Hoddesdon (F. M. C.). 34. Salticus cingulatus (Panzer). Hoddesdon (F. M. C.). This species is not nearly so common as the last. 35. Euophrys frontalis (Walckenaer). Hoddesdon (F. M. C.). Known also as Salticus sparsus, Blackwall. 38. Ergane falcata (Clerck). Hoddesdon (F. M. C.). Known also as Salticus coronatus, Blackwall. 173