Front Matter
p. 0
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The Genetics of Congenital Pyloric Stenosis
Cockayne, E. A.; Penrose, L. S. pp. 1-16
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Book Notices
p. 16
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The Gipsy at the Crucifixion of Christ
Mahr, August C. pp. 17-21
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The Ants of Ashtabula County, Ohio (Hymenoptera, Formicidae)
Headley, A. E. pp. 22-31
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Life History and Habits of the Cicada Killer in Ohio
Dambach, Charles A.; Good, Eugene E. pp. 32-41
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Book Notices
p. 41
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A New Chrysobothris (Buprestidae: Coleoptera)
Knull, Josef N. p. 42
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Transpiration in American Holly in Relation to Leaf Structure
Swanson, C. A. pp. 43-46
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The Effect of pH on Pure Cultures of Euglena Mutabilis
Dach, Herman Von pp. 47-48
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Back Matter
p. 999
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