Abstract: | Adults and cephalic structures of the final instar of two new species of Gelis, G. potteri sp. nov. and G. rabidae sp. nov. are described, one from eastern Canada with host eggs of Agelenopsis potteri (Blackwall), and the other from Kansas [USA] with host eggs of Lycosa rabida Walckenaer. All material was reared, enabling association of females with males, adults with larvae, and both adults and larvae with hosts. In addition, knowledge of characteristics of adults and cephalic structures of last instars is expanded.
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