. Economic entomology for the farmer and fruit-grower [microform] : and for use as a text-book in agricultural schools and colleges . Bibio albipennis.—a, male; c, its head; b, fe- male ; rf, her head ; e, f, g, other structural details.

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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphila, bookyear1896