Front Matter
pp 0
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Some Aspects of the Life Histories of Three Closely Related Crayfish Species, Orconectes Obscurus, O. Sanborni, and O. Propinquus
Fielder, Dorothy Davis pp 129-145
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Book Review
pp 145-145
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Effects of Temperature on Seta Elongation in Atrichum Undulatum
Stevenson, Dennis Wm.; Rastorfer, James R.; Showman, Ray E. pp 146-152
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Falco Peregrinus Pealei in Ohio : An Error
White, Clayton M. pp 153-154
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Echinocaris Punctata (Hall) from the Hamilton Group, Thedford, Ontario
Murphy, James L. pp 155-157
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Two New Subgenera and Two New Species of Gyponana (Homoptera: Cicadellidae)
DeLong, Dwight M.; Freytag, Paul H. pp 158-160
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Studies of the Gyponinae (Homoptera: Cicadellidae) : Fourteen New Species of Gypona from Central and South America
DeLong, Dwight M.; Martinson, Candace pp 161-170
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The Early Stages of Ablabesmyia Annulata (Say) (Diptera, Chironomidae)
Boesel, M. W. pp 170-173
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Book Reviews
pp 174-176
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Back Matter
pp 999
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