An Annotated Key to the Nearctic Males of Limnephilus (Trichopetra, Limnephilidae)

Originally thiis paper was planned for some notes concerning species of Limnephilus from Utah. These were assembled by the junior author in the course of a survey of the caddisflies of that state. As the work progressed, it seemed advisable to bring up-to-date and include a key which the senior author has had in manuscript. There has been a need for some time for a key to the Nearctic species of this group, and it is hoped that this one will be of assistance in the identification of the North American forms. Reference is given in the key to existing illustrations for many species; for the remainder drawings are given in this paper. We have been aided greatly by assistance from several workers. Mr. Fernand Schmid has convinced us of the value of regarding Lenarchus and Philarctus as genera, rather than as subgenera as was our original intention. Dr. Denning has graciously loaned us critical material, and many other friends have furnished valuable state records. The officers of the Museum of Comparative Zoology and the United States National Museum have placed at our disposal types and other material for study. To all these we wish to express our appreciation. The types of the new species described in this paper are in the collectioni of t'ae Illinois Natural History Survey.