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An Improved Biotic Index of Organic Stream Pollution
William L. Hilsenhoff

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New records of two adventive bee species in Indiana (Hymenoptera: Colletidae; Megachilidae)
Hannah G. Kernen, Robert P. Jean, Brock A. Harpur, Jacob Buck, and Jennifer Noseworthy

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The Singing Insects of Michigan
Richard D. Alexander, Ann E. Pace, and Daniel Otte

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A Modification of the Biotic Index of Organic Stream Pollution to Remedy Problems and Permit Its Use Throughout the Year
William L. Hilsenhoff

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Impact of Debarking and Bark Grinding on Survival of Ips calligraphus (Coleoptera: Curculionidae: Scolytinae)
Robert A. Haack, Toby Petrice, John Foltz, and Hui Ye

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Laboratory rearing methods for the soybean tentiform leafminer (Lepidoptera: Gracillariidae), a new pest of soybean
James Menger, Arthur Ribeiro, Fabio Fuhr, and Robert L. Koch

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A Quadriocellar Hedychridium caeruleum (Hymenoptera: Chrysididae) from Manitoba, Canada
Kira Peters and Jason Gibbs

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Confirmation of Avian Dispersal of a Seed Chalcid Wasp in North America and a New Host Record for Megastigmus aculeatus (Hymenoptera: Megastigmidae)
Julie A. Craves

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First known records of the specialist bee, Colletes aestivalis (Hymenoptera: Colletidae), in an urban area
Nina S. Fogel, Christine Kirmaier, and Mike Arduser

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The Malaise Trap: Its Utility and Potential for Sampling Insect Populations
Robert W. Matthews and Janice R. Matthews