Front Matter
pp 0
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The Propinquus Group of the Crawfish Genus Orconectes (Decapoda: Astacidae)
Fitzpatrick, J. F., Jr. pp 129-172
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Conversion Yields of Some Photographic Emulsions and Related Factors
Gebel, Radames K. H.; Duke, Gary L. pp 173-183
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Book Review
pp 183-183
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A New Species of Draeculaacephala (Homoptera-Cicadellidae) from Chile
DeLong, Dwight M. pp 184-185
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Book Review
pp 185-185
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Records of Ohio Fleas (Siphonaptera)
Humphreys, J. G. pp 186-190
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A Test for Penicillins on Chromatograms and in Spot Tests
Goldman, Margaret; Day, Richard A. pp 190-191
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Rare Birds at Lake Saint Marys, Ohio
Sipe, James P. pp 191-191
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Book Reviews
pp 191-192
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Back Matter
pp 999
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