The preparatory stagees of this pretty Phalenid are not given in Packard's “Monograph of the Geometrid Moths”, nor cited by Henry Edwards in his “Catalogue of the Preparatoy Stages of N. A. Lepidoptera”; and, since they differ in some regards from the general characters of the caterpillars of the genus as given by Guenée, I have drawn up a brief account of larva and pupa.