Abstract
The thoracic mechanoreceptors of the wings and their central projections in the noctuid moth Heliothis zea (Lepidoptera: Noctuidae) were investigated using cobalt chloride infiltration methods. The different mechanoreceptors, tegula, campaniform sensilla, and chordotonal organ were identified as being present in the wing bases. The forewing and hindwing bases were innervated by two large nerve trunks (IIN1 and IIIN1, respectively). Terminal projections for both wing bases included massive regions within the fused meso-metathoracic and prothoracic ganglia, as well as direct projections to the suboesophageal ganglia. The terminal fields of IIIN1 were exclusively ipsilateral, whereas those of IIN1 also were contralateral. The relationship of these sensory mechanoreceptors to the neural basis of evasive flight behaviours is discussed.
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