The forewings have at least a single longitudinal nervure - often two - reaching from base to tip of the wing. [Please select]
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It needs not now to be resistant, because it is covered by the two firm forewings, which shield and protect it, except when the insect is flying. [Please select]
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Cockroaches and grasshoppers belong to an order of insects, the Orthoptera[5], characterised by firm forewings and biting jaws; in all of them the change of form during the life-history is comparatively slight. [Please select]
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Their heavily armoured bodies and their firm shield-like forewings render them less aerial than other insects; in many genera the power of flight has been altogether lost. [Please select]
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