The genus Omiodes contains 23 endemic Hawaiian moth species. Species in the group have adapted to a wide range of host plants, and two species became economic pests of sugarcane and coconut. Because of their pest status, biological control agents were released to control these two species in crops. At present two-thirds of the other Hawaiian species in the genus are listed as extinct, and their precipitous declines have been attributed to the non-target effects of introduced parasitoids. In the last six years however, five of the extinct species have been “rediscovered,” and more may be detected with additional surveys. The objective of this research is to quantify parasitism rates in Omiodes species using controlled exposure trials, as well as surveys of wild larvae. Field trials were conducted on Maui during summer 2006, wherein Omiodes continuatalis eggs and larvae were exposed to parasitism under varying conditions, then retrieved and reared until emergence. Initial data indicate lower than expected parasitism rates in sentinel larvae, in contrast to higher rates observed in field collections of other Omiodes species. However, behavioral adaptations of certain species may account for widely varying parasitism rates observed within the genus. Additional trials will be completed to further investigate the effects of parasitism by native vs. non-native parasitoids, the effects of predation vs. parasitism, and compare the rates of parasitism in sentinel larvae to those observed in wild populations. Whether indicative of low or high impacts by introduced parasitoids, results of this research will provide valuable information for future biological control efforts in Hawai‘i.