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Scanning electron micrographs of the wing web skin (a) and the body skin (b) showing the remarkable topographical differences. The wing web is virtually devoid of hairs. Its rough surface presents keratinized layers in the process of peeling off (see also Figs 3 and 5). In contrast, the body skin is virtually covered by a thick coat of tall hairs, fully masking the skin surface. Scale bars: a = 10 µm; b = 500 µm.
