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 Still an Anatomical Solution of these Appearances was wholly unknown. What (s) Ovid says of the Metamorphoses of Insects, is suitable enough to the Design of his Poem: And there we may well allow such a Natural Change of Caterpillars into Butter-Flies, as is not to be accounted for by the Regular Laws of Growth and Augmentation of Natural Bodies. But a Natural Historian has no need of the Fictions of a Poet. These Difficulties therefore were cleared by Swammerdam (t), who, in his General History of Insects, proves, that all the Parts of the full-grown Insect, which first appears in a different Form from what it assumes afterwards, were actually existent in the Fœtus, which creeps about as a Caterpillar, or a Maggot, till the Wings, Horns and Feet, which are inclosed in fine Membranes, come to their full Growth; at which Time that Membrane, which at first was only visible, dries up, and breaks; out of which comes forth the Insect proper to that Kind; which then gendring with its like, lays such Eggs as in a seasonable Time are hatched; that so the Species, which is not generated by Chance, may always be preserved.