The beech leaf-mining weevil (Orchestes fagi L. (Coleoptera: Curculionidae)) is widespread in its native Europe and has recently been introduced to North America. Its leaf-mining larvae feed exclusively on beech (Fagus L. (Fagaceae)) species. They form a linear mine from the oviposition site on the midrib to the leaf margin and cause extensive wilting and browning of leaves. No other leafminers occurring in North America cause similar damage to beech. Adults also feed on expanding beech leaves in spring, causing scattered "shot" holes. In Europe, the beech leaf-mining weevil does not cause mortality in the Palearctic species European beech (Fagus sylvatica L.), despite occasional outbreaks in European beech forests that cause defoliation, lower fruit production, and retard growth. In North America, the first adult specimens of beech leaf-mining weevil were collected in 2012 in Nova Scotia, Canada, in Halifax, Lunenburg, and Cape Breton counties, where they were associated with American beech (Fagus grandifolia Ehrh).