Abstract

I ENCLOSE photographs (Fig. 1) of two locusts with the following history: The eggs were hatched and the young reared inside, in glass, so that the only sunlight that could reach them was screened through two layers of glass; other conditions were identical with such as produced perfectly normal flyers. They remind one strongly of similarly localized (and similarly produced?) abnormalities in Drosophila, and we may legitimately assume that the abnormality will be hereditary.

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