The Palearctic root weevil Otiorhynchus porcatus (Herbst) (Curculionidae: Entiminae) is recorded for the first time in the United States on Appledore Island, Isles of Shoals, Maine. A summary of other published North American records of this immigrant species is given. Also included are distribution records for 16 other adventive weevils collected on five of the nine islands comprising the Isles of Shoals. These 16 species are Perapion curtirostre (Germar), Cosmobaris scolopacea Germar, Ceutorhynchus erysimi (Fabricius), Ceutorhynchus obstrictus (Marsham), Ceutorhynchus pallidactylus (Marsham), Rhinoncus pericarpius (Linnaeus), Tychius meliloti Stephens, Tychius stephensi Schönherr, Barypeithes pellucidus (Boheman), Otiorhynchus sulcatus (Fabricius), Trachyphloeus bifoveolatus (Beck), Donus zoilus (Scopoli), Hypera meles (Fabricius), Hypera rumicis (Linnaeus), Larinus planus (Fabricius), and Magdalis barbicornis Latreille.