Water content and percentage of total body water (TBW) lost as a function of time was determined for four common predators in the peanut agroecosystem that may feed on the lesser cornstalk borer,Elasmopalpus lignosellus(Zeller) (Insecta: Lepidoptera: Pyralidae). TBW loss byGeocoris punctipes(Say) (Hemiptera: Lygaeidae),Reduviolus roseipennisReuter (Hemiptera: Nabidae), andOxyopes salticusHentz (Aranae: Oxyopidae) increased linearly with desiccation time, but for workers ofSolenopsis invictaBuren (Hymenoptera: Formicidae), it increased as a curvilinear function of desiccation time. Mortality of insects in a 24-h period was 69.4 and 80.6% for nymphal and adultG. punetipes, 16.7 and 58.1% for nymphal and adultR. roseipennis, 100% forS. invietaworkers, and 14.7 and 13.0% for nymphal and adultO. saltieus.These high mortalities suggest that the lesser cornstalk borer is better able to survive xeric conditions than some of its common predators.