Abstract
Two Old World limnephilid genera are recorded from North America for the first time: Chilostigma with C. itascae n. sp; and Ecclisocosmoecus to which is transferred the former Ecclisomyia scylla Milne. Three new species are also described in other genera: Dicosmoecus schmidi n. sp., Cryptochia denningi n. sp., and Neothremma andersoni n. sp. The taxonomic status of the genus Psychoronia is reviewed.

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