A hawthorn twig (Crataegus species) with an associated butterfly, its caterpillar, chrysalis and anatomical segments. Coloured etching, c. 1831.

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A hawthorn twig (Crataegus species) with an associated butterfly, its caterpillar, chrysalis and anatomical segments. Coloured etching, c. 1831. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.