Front Matter
p. 0
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Cytoplasm and Heredity
Shull, A. Franklin pp. 1-8
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Some New Species of Nearctic Tingidae
Osborn, Herbert; Drake, Carl J. pp. 9-15
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A Monstrosity in Trillium Grandiflorum
Weston, William H. pp. 16-20
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Descriptions of Robber Flies of the Genus Erax
Hine, James S. pp. 21-22
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News and Notes
pp. 23-24
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Back Matter
p. 999
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