Footnotes in the larval revision of the North American Aegeriidae (MacKay 1968) indicate that additional material of Cissuvora ampelopsis Engelhardt and [Carmenta] phoradendri Engelhardt was received too late for incorporation in the study. The material consists of a prepupal larva associated with an adult that is posifively identified as Cissuvora ampelopsis and two last-instar larvae believed to be phoradendri, and is discussed in this paper. The study of the material indicates that the unique larva referred to in the 1968 work as “probably Cissuvora ampelopsis” is of an unidentified genus and species, and that the species phoradendri is in Synanthedon rather than in Genus I of the Carmenta group. The larva of the true ampelopsis is described and illustrated here and the characters that key the larvae of phoradendri to Synanthedon are listed.