Figure 13: Eggs of Ephestia kuehniella are shown that were exposed to S. tsugae and L. nigrinus. In Figure 13a, an egg that had been utilized by S. tsugae is seen with its characteristic depletion because the materials had been removed by the predator, and the egg is also dark due to the action of the polyphenol oxidase that takes place as part of the predators’ extra-oral digestion [36,37]. Because the use of eggs themselves elicited few feeding bouts, we also tried to “disguise” the Ephestia eggs as HWA by placing fresh adelgid wool and exudates (Figure 13b) to determine whether or not the HWA materials would enhance predation. There was no evidence of enhanced feeding in the presence of adelgid wool or fecal exudates, so efforts to disguise factitious prey were discontinued.