Definitionn. an insect or other arthropod between molts
Last update: July 29, 2015
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Its condition thus recalls the pupal instar of the higher (Endopterygote) Hexapoda; and the Thysanoptera, though few in number, are seen to be of great interest to the student, exhibiting at once a transition between the biting and the suctorial mouth, and the passage from " incomplete " to " complete " metamorphosis. [Please select]
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The first instar differs, however, from the adult in one conspicuous and noteworthy feature, it possesses no trace of wings. [Please select]
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Having been formed beneath the cuticle of the wing-rudiments of the penultimate instar, the wings are necessarily abbreviated and crumpled. [Please select]
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Wing-rudiments appear, however, in an early instar as visible outgrowths on the thoracic segments, and become larger after each moult. [Please select]
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The preparatory instars of such insects are aquatic; the adult instar is aerial. [Please select]
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The instar that emerges from the nymph-cuticle is a sub-imago, dull in hue, with a curious immature aspect about it. [Please select]
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The sub-imaginal instar of the may-fly furnishes also a noteworthy fact for comparison with other insect histories. [Please select]
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