Sense Organs of the Hyperparasite Cheiloneurus noxius (Hymenoptera: Encyrtidae) Important in Host Selection Processes

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Abstract
Cheiloenurus noxius Compere, a hyperparasite of unarmored scale insects, lays its eggs within the bodies of primary parasites of these scales. The location and structure of female sense organs, involved in discrimination secondary (scale) hosts, was investigated. Scanning electron micrographs showed that sensilla at the tips of the antennae were morphologically distinct from those more proximally situated. Sensory deprivation experiments involving partial removal of the antennae suggest that these terminal structures are the sense organs primarily responsible for receiving stimuli from the secondary host.

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