Abstract
The following is chiefly a description of taxonomically important features of all stages of Paraclemensia acerifoliella (Fitch). Heretofore the most detailed description of the stages of an incurvariid appeared in Jensen's (1932) paper on Incurvaria koerneriella Zell.Classification and SynonomyThe maple leaf cutter, Paraclemensia acerifoliella (Fitch), belongs to the Incurvariidae, one of the most primitive families in the suborder Frenatae (suborder Monotrysia of Börner, 1939). Asa Fitch (1856) described this species and placed it in the genus Ornix in the family Tineidae. Clemens (1860) referred it to the genus Incurvaria with the remarks that “The wing structure departs from that of the genus [Incurvaria]….”

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