A survey of the adult Leptoceridae of West Virginia revealed 27 species, 25 of which were state records. The most abundant genus in the state was Ceraclea which had ten different species. Triaenodes had six different species, while Oecetis had five. The most common species in the state included C. cancellatus, C. maculate, O. avara, and O. inconspicua. Species that were abundant only in the larger rivers of the western portion of the state included C. flava, C. maculata, Nectopsyche pavida, and T. ignita. C. neffi seemed to be most abundant in the higher elevations of the east. Ceraclea ophioderus, C. slossonae, and C. wetzeli were important range extensions into West Virginia. Many species emerged throughout the summer suggesting multi-cohort populations
