In the accounts of the outbreaks of the strawberry leaf-roller, Ancylis comptana Frohl., which are more or less sudden and local, at no time have parasites been mentioned as common. In a study of the parasites of the leaf-roller under normal infestations, six species of Hymenopterous parasites, three more probable parasites, and one Tachinid fly were found to be parasitizing the leaf-roller. Four additional species are reported in the literature, which were not obtained in this study. Observations would indicate that at least during the season of 1924 in Ohio, the natural enemies maintained a sufficient check on the leaf-roller to prevent serious injury.