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Effects of Certain Climatic Factors on the Daily Abundance of the European Earwig, Forficula auricularia L. (Dermaptera: Forficulidae), in Vancouver, British Columbia1

  • D. A. Chant (a1) and J. H. McLeod (a1)

Extract

During September, 1950, 23,180 specimens of the European earwig, Forficula auricularia L., were collected in Vancouver, British Columbia, for the purpose of recovering the imported parasite Bigonicheta setipennis (Fall.). Great fluctuations were observed in the number of insects caught from day to day. This paper is an attempt to assess the role of various climatic factors in these fluctuations.

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References

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Davidson, L., and Andrewartha, H. G.. 1948. The influence of rainfall, evaporation and atmospheric pressure on fluctuations in the size of a natural population of Thrips imaginis (Thysanoptera). J. Anim. Ecol. 17: 200222.
Gibson, A., and Glendenning, R.. 1925. The European earwig. Canada Dept. Agr., Entomological Branch, Circ. No. 24.
Glendenning, R. 1947. The European earwig. Canada, Dept. Agr., Div. Ent. Processed Publication No. 21 (Revised).
Mills, F. C. 1938. Statistical methods: Applied to economics and business. Revised. Henry Holt & Co., New York, N.Y.
Snedecor, G. W. 1946. Statistical methods. Iowa State College Press, Ames, Iowa.
Uvarov, B. P. 1931. Insects and climate. Trans. Ent. Soc. London 79: 1247.
Wellington, W. G. 1946. The effects of variations in atmospheric pressure upon insects. Canadian J. Res., D, 24: 5170.

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