PRACTICAL ENTOMOLOGY A Contribution to the Study of the Insect Fauna of Human Excrement (with especial reference to the Spread of Typhoid Fever by Flies). By L. O. Howard, Ph. D. Proc. Washington Acad. Sciences, December 28, 1900. Royal 8vo., pp. 60, fig. 22, plates 2.

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Fletcher, J.;

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