. The fossil insects of North America, with notes on some European species [microform]. Insects, Fossil; Insects; Insectes fossiles; Insectes. 56 TKRTIAKY INSECTS OP NORTH AMERICA. Leiifrth of body, Idb"""; cephalothorax, ;""; abdomen, ;""*; breadth of cephalothomx, ;"'; abdomen, ;'"'. The legs are imperfect in tlie single specimen known, and as no palpi are preserved the sex is uncertain. The species differs from both the pre- ceding in its much larger size; from P resurrectus also in its very quadrate cephalothorax,
. The fossil insects of North America, with notes on some European species [microform]. Insects, Fossil; Insects; Insectes fossiles; Insectes. 56 TKRTIAKY INSECTS OP NORTH AMERICA. Leiifrth of body, Idb"""; cephalothorax, ;""; abdomen, ;""*; breadth of cephalothomx, ;"'; abdomen, ;'"'. The legs are imperfect in tlie single specimen known, and as no palpi are preserved the sex is uncertain. The species differs from both the pre- ceding in its much larger size; from P resurrectus also in its very quadrate cephalothorax, and from P. evocatus in its globular abdomen. Florissant, No. 9823. Suborder LATERIGRAD^E Thorell. The two families of crevice-inhabiting crab-spiders which have been found fossil in Tertiary deposits, Thoniisides and Philodrominae, are both (the former particularly) common at the present day in Europe and North America. The fossil species belong mostly to the former, only four species of PiiilodrominsE having been recorded, all from amber, while tw, nty-one Thomisides are known, not including those described below, all of which also fall here. In this statement the strange amber genus Archaja is not included, since, though placed by both Menge and Thorell in this group, it differs strikingly from the other members and should form a family group apart from them, having no known affinities with any of the species from the stratified deposits of Europe or America. (November, 1881.) Two additional species of Thomisides have lately been described from Aix by Gourret. (October, 1889.) Family THOMISIDES Sundevall. All but four of the fossil Thomisides described up to the present time come from amber and represent the genera Athera (one species), Clythia (five species), Ocypete (four species), Opisthophylax (one species), Syphax (five species), and Thomisus (one species). Thomisus is also represented, with Xysticus, by two species each in the stratified deposits of Oeningen and Rott,
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