Volume 23, Number 2 - Summer 1990 (1990)
Peer-Review Articles
Late Summer-Fall Solitary Wasp Fauna of Central New York (Hymenoptera: Tiphiidae, Pompilidae, Sphecidae)
Frank E. Kurczewski and Robert E. Acciavatti
Aggregation Behavior of a Willow Flea Beetle, Altica Subplicata (Coleoptera: Chrysomelidae)
Catherine E. Bach and Deborah S. Carr
Gyrinidae of Wisconsin, With a Key to Adults of Both Sexes and Notes on Distribution and Habitat
William L. Hilsenhoff
Parasitoids of Chionaspis Pinifoliae (Homoptera: Diaspididae) in Iowa
Daniel J. Burden and Elwood R. Hart
Eastern Range Extension of Leptoglossus Occidentalis With a Key to Leptoglossus Species of America North of Mexico (Heteroptera: Coreidae)
J. E. McPherson, R. J. Packauskas, S. J. Taylor, and M. F. O'Brien
Seasonal Flight Patterns of Hemiptera (Excluding Miridae) in a Southern Illinois Black Walnut Plantation
J. E. McPherson and B. C. Weber