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Variation in two populations of Gryllus bimaculatus de Geer (Orthoptera: Gryllidae).

McGill University
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  • Entomology.


Gryllus bimaculatus de Geer is one of the most widely distributed species of field crickets and ranges from South Africa, the Mediterranean basin, Southern Asia and the East Indies to Japan. (Cousin, 1956, 1961). Chopard (1938) found that this species does not range north of the northern shore of the Mediterranean. Cousin (1941) was the first to recognize the significance of a regular phenomenon in the variation of pigmentation of G. bimaculatus specimens reared in the laboratory from collections made in the field in southern France.

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