Epinotia medioviridana (Kft.) (1908) is represented by very few specimens in any collection; there are two in the Canadian National Collection: a paratype (one of the six originally described) and a specimen from Tuxedo, N.Y. The species has been collected at Ottawa, which is its type locality, and in western Pennsylvania, but until now nothing has been known of its life history. During the summer of 1951, five last-instar larvae were collected from flowering raspberry, Rubus odoratus L., at Meach Lake, Que.; three were preserved and two reared to maturity. The following description has been obtained from the three preserved larvae and the two last-instar skins.