During the first week of April, 1937, while on a collecting trip in central Florida, the writer found a larva of a notodont on oak; at the time of collecting the larva was referred to Symmerista with some doubt as it was unlike the northern specimens, being darker in color and with less contrast in pattern. This larva pupated at Ithaca and the moth, a normal albifrons female, emerged the end of May. Nothing more was thought of the matter until the writer began a general survey of the genitalia of the Notodontidae, preparing a series of genitalic slides of each American species. It was after discovering that the northeastern species of Symmerista was easily and readily divisble into three species on both male and female genitalia that the larva was thought to have some significance.