The Thysanoptera, small insects with firmly chitinized cuticle, are recognized by the combination of imperfectly suctorial jaws - the mandibles acting as piercers and maxillae retaining their palps (see fig. [Please select]
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The Anthrax' cupping-glass is here replaced by piercers of exceeding sharpness and so short that they cannot hurt anything beyond the skin.' [Please select]
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