tympanal hood
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tympanal bullae — see tympanal hood … Dictionary of invertebrate zoology
hood — n. [A.S. hod] 1. A color marking or expansion suggesting a hood. 2. (ARTHROPODA: Chelicerata) In beetle mites, the dorsal wall of the camerostome that extends over the capitulum. 3. (ARTHROPODA: Insecta) a. In notodontoid and noctuoid Lepidoptera … Dictionary of invertebrate zoology