The mean consumption rate after 72 h in the laboratory ofIps grandicollis(Eichhoff) eggs byLyctocoris elongatus(Reuter) was significantly higher (P<0.05) for all feeding life stages than that byScoloposcelis mississippensisDrake and Harris. Both anthocorid species fed on bark beetle eggs, larvae, and pupae and showed evidence of cannibalism and territoriality. AdultS. mississippensisalso fed on several associated insect predators and parasites of bark beetles. Fifth-instar nymphs ofS. mississippensisdid not differ significantly (P<0.05) in consumption rates forI. grandicollisandDendroctonus frontalisZimmermann eggs