Volume 25, Number 2 - Summer 1992 (1992)

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Dytiscidae and Noteridae of Wisconsin (Coleoptera). I. Introduction, Key to Genera of Adults, and Distribution, Habitat, Life Cycle, and Identification of Species of Agabetinae, Laccophilinae and Noteridae
William L. Hilsenhoff

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New Larval Descriptions and Comparisons of North American Choroterpes (Ephemeroptera: Leptophlebiidae)
W. P. McCafferty

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Distribution of the Water Scorpion Nepa Apiculata (Hemiptera: Nepidae) in Wisconsin
P. A. Cochran, A. P. Gripentrog, and K. M. Stack

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The Return of Hexagenia (Ephemeroptera: Ephemeridae) to the Lower Fox River, Wisconsin
Phillip A. Cochran

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Seasonal Drift of Lethocerus Americanus (Hemiptera: Belostomatidae) in a Lake Superior Tributary
Robert B. DuBois and Michael L. Rackouski

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Diagnostic Alleles From Electrophoresis Distinguish Two Noctuid Pest Species, Hydraecia Immanis and H. Micacea (Lepidoptera: Noctuidae).
J. Mark Scriber, Janice L. Bossart, and Doozie Snider

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Holarctic Insects Adventive in Michigan: New and Additional Records (Homoptera, Heteroptera, Coleoptera, Neuroptera)
A. G. Wheeler Jr.

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Factors Influencing Length and Volume of Cells Provisioned by Two Passaloecus Species (Hymemoptera: Sphecidae)
John M. Fricke

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A Check List of the Lepidoptera of Beaver Creek State Park, Columbiana County, Ohio
Roy W. Rings and Eric H. Mezler

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The Sand-Dwelling Predatory Mayfly Pseudiron Centralis in Michigan (Ephemeroptera: Pseudironidae)
W. P. McCafferty

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New and Additional Distribution Records for Several Rare Mayflies (Ephemeroptera) in Wisconsin
Richard A. Lillie