Wrote Letter L-300 of 1696-08-26 to Frederik Adriaan van Reede about plant-lice, its embryos and parasitization, black flies and their caterpillars on apple-trees, and English oysters from Zierikzee

August 26, 1696
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Text of the letter in the original Dutch and in English translation from Alle de Brieven. The Collected Letters at the DBNL - De Digitale Bibliotheek voor de Nederlandse Letteren

Leeuwenhoek wrote this letter about …

While looking for honey-dew on the leaves of a lime-tree, L. finds a great many plant-lice. L. distinguishes two kinds, with and without wings. Embryos from plant-lice. Parasitization of plant-lice. Black flies are not born in ditch-water. L. associates black flies on apple-trees with the caterpillars found there. Vain attempts to obtain pupation of the caterpillars. English oysters planted in the neighbourhood of Zierikzee did not contain any young and tasted excellent.