Browse Prairie Research Institute by Author "Davis, J.J."

  • Davis, J.J. (Champaign : Illinois Natural History Survey, 1919-02)
    On account of the difficulty of controlling the common white-grubs, which pass ninety-fiver per cent of their life under ground, their natural enemies are of unusual importance to the farmer. No one species of animal can ...

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  • Davis, J.J. (Champaign : Illinois Natural History Survey, 1913-09)
    Many inquiries, from specialists on the Aphididae, and others, regarding the disposition and condition of the Thomas collection of Aphididae have been received, and the following data, most of which are based on a study ...

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  • Davis, J.J. (Champaign : Illinois Natural History Survey, 1920-08)
    Among the many collections of May-beetles received from entomologists throughout the country have been found several apparently new species and varieties. Requests from the collectors for names which they could use in ...

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