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The hygroscopic secretion produced by the secretory setae of terrestrial larvae of the biting midge Forcipomyia nigra (Winnertz) was analysed using gas chromatography coupled with mass spectrometry (GC–MS). The viscous secretion is stored at the top of each seta and absorbs water from moist air. GC–MS analyses (four independent tests) showed that the secretion contained 12 free fatty acids, the most...
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