On the Entomology of the Illinois River and Adjacent Waters

Abstract

This paper gives a part of the results of our observation and study of the insect fauna of the Illinois River and adjoining waters in the neighborhood of the University of Illinois Biological Experiment Station, at Havana, Illinois, during the first year of the Station work, as a preparation for further and more detailed observations in the same field.  The insects treated belong to three groups: the aquatic caterpillars (Lepidoptera), the hymenopterous enemies or parasites of water insects (Hymenoptera), and the aquatic flies (Diptera) of several families, especially the crane-flies (Tipulidae ) the soldier flies (Stratiomyiidae) and the horse-flies (Tabanidae), the larvae of all these families being largely aquatic in habit.  Includes keys to immatures of the orders, families, genera, and species, with detailed species accounts.  Several undescribed species are discussed (but not named), and Odontomyia snowi n. sp. is described from Champaign County, IL, but in the volume errata is corrected as shown to be O. hieroglyphica.