Montiphylax, (Trichoptera, Limnephilidae), a new genus to accommodate the western North American species: Stenophylax antennatus Banks, 1900, Philocasca thor Nimmo, 1971, and Philocasca alba Nimmo, 1977

Montiphylax, a new genus within the Limnephilidae, is proposed to include Philocasca alba, P. antennata, and P. thor. Characters for the adults and larvae are presented to separate Montiphylax from Philocasca. A summary of the distribution and life history of the Montiphylax species is provided. A key to ease separation of the known North American caddisfly larvae with gill clusters of single filaments is given