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Published online by Cambridge University Press: 31 May 2012
Metrioptera (Roeseliana) roeselii (Hgb.) was first introduced into the Montreal, Que., area before 1952. By 1965 it had been collected in western and southern New York State. This paper records it from Maine, Massachusetts, and New Hampshire for the first time, and discusses the populations. Eventual establishment of M. roeselii over all of New England is predicted.