Vol. 22, No. 2 (April 1939)

Literature Review Articles

• Two New Thysanoptera from Mexico

  J. R. Watson

  17-20

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• Arthur P. Jacot

  Editors

  20

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• The Physiological Effects of Mineral Oils on Citrus

  L. W. Ziegler

  21-30

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• Some Ecological Notes on the Lubberly Locust--Romalea Micropter Beauv.

  J. R. Watson, H. E. Bratley

  31

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• Back Matter

  Editors

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