The koa moth (Scotorythra paludicola) is a species of moth that has been reported to irrupt in great abundance on occasion over the past 100 years, sometimes defoliating its host plant, koa (Acacia koa), during the event. This data release includes metadata and tabular data that document temporal abundance patterns of parasitoid wasps (Hymenoptera) that are known to attack koa moth caterpillars during an outbreak of the koa moth that resulted in widespread defoliation of koa across much of Hakalau Forest National Wildlife Refuge during 2013-2014. The data set documents numbers of the parasitoid wasps Hyposoter exiguae (Ichneumonidae) and Meteorus laphygmae (Braconidae) collected in malaise traps during the outbreak. Malaise traps were deployed at several sites during the outbreak to allow moth abundance to be tracked over time.