Abstract
When the polyphagous parasite Itoplectis conquisitor (Say) was reared on either of two hosts, Thymelicus lineola (Ochs.) or Galleria mellonella L., it showed no preference for the host from which it had emerged when exposed to equal numbers of the two hosts in the same type of ecological niche. No evidence for the existence of preimaginal conditioning in I. conquisitor was obtained.