Aside from the wasps distinguished by their folded wings (Diploptera) and the Chalcidian genus Leucospis, there is no record, unless of distant date, of any Hymenopterous insect having the wings folded. In Coptera the “longitudinal fold” described by Say is in reality a pleat of ridge; the wings, as I have repeatedly observed in the living insect, being laid flat upon the back and never folded.