The distribution of eggs of the Scolytidae predator Medetera aldrichii Wheeler on oviposition grids arranged on a prey-infested tree, showed that selection of predator oviposition sites was influenced by proximity of the prey's gallery entrance and ventilation holes. Adult and larval response to commercial D-alpha-pinene in laboratory ol-factometric studies indicated that volatiles emanating from prey galleries at these sites release appetitive ovipositional behavior from the gravid female and guide the bark-surface orientation of the newly eclosed predator larva from oviposition sites toward prey gallery openings.
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Fitzgerald et al. (1972) studied this question.
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