In a collection of Hemiptera sent me some time since for identification, were two male specimens of a coccid, and a single white waxy sac, from which one had issued, attached to the upper surface of a small, oval leaf, which at the time, from a supeficial examination, I took to be a mealy bug, Dactylopius longifilis Comstock; but recently on a more careful examination I find to be a species of that interseting genus Orthesia Bosc.