• Darwin Archive | 'Cross and self fertilisation': portfolios, 1840s-1876 | 'Cross and self fertilisation': observations on insects visiting flowers and 'Cross and self fertilisation' experiments, 1840s-1860s | 'Old observations on Diptera sucking Flowers' | In Bates letter in Portfolio (4) case of Butterfly attracted by bright sepal of flower, 1809-01-01 - 1882-04-30

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