Volume 15, Number 2 - Summer 1982 (1982)

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Impact of the Redheaded Pine Sawfly (Hymenoptera: Diprionidae) on Young Red Pine Plantations
Robert D. Averill, Louis F. Wilson, and Richard F. Fowler

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Bioassay of the Nucleopolyhedrosis Virus of Neodiprion Sertifer (Hymenoptera: Diprionidae)
M. A. Mohamed, H. C. Coppel, and J. D. Podgwaite

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Effects of Continuous and Split Developmental Photophases During Each 24 Hour Period on Adult Color and Pubescence in Thyanta Calceata (Hemiptera: Pentatomidae)
J. E. McPherson and S. M. Paskewitz

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A New Species of Hydrochara (Coleoptera: Hydrophilidae) from the Western Great Lakes Region
William L. Hilsenhoff and Bryn H. Tracy

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Accuracy and Precision of Insect Density and Impact Estimates
Gary W. Fowler and John A. Witter

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The Role of Tree Clinics in Urban Forestry
J. A. Witter and H. L. Morton

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A Directory of Policies on Arthropod Collecting on Public Lands
Gary A. Dunn

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Triepeolus Mesillae (Hymenoptera: Apoidea) in Illinois: A Cleptoparasitic Bee New to the Eastern United States
John K. Bouseman

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Michigan Trees. Burton V. Barnes and Warren H. Wagner, Jr. The University of Michigan Press, Ann Arbor. 384 pages, 120 figures. 1981. $10.95 (cloth), $5.95 (paper).
D. C. L. Gosling

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Butterflies of the Rocky Mountain States. Edited by Clifford D. Ferris and F. Martin Brown. University of Oklahoma Press, Norman. 464 pages, incl. 4 color plates. 1981. $35.00 (cloth), $15.95 (paper).
M. C. Nielsen

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Predation on the Pupae of Saturniidae (Lepidoptera) by Gray Squirrels in Wisconsin
Allen M. Young