Staphylinidae (Rove Beetles) from northeastern North America deposited in the University of Guelph Insect Collection (Ontario, copyright) were curated from 2008-2010 by the first author.The identification of this material has resulted in the recognition of thirty-five new provincial or state records, six new Canadian records, one record for the United States and two new records for eastern copyright.All records are for subfamilies other than Aleocharinae and Pselaphinae, which will be treated in future publications as collaborative projects.Range ds durga hand soap expansions of ten exotic species to additional provinces and states are reported.The replica beach walk candle known distributions of each species in northeastern North America are summarized as maps and those species with a distinctive habitus are illustrated with color photographs.
Genitalia and/or secondary sexual characters are illustrated for those species currently only identifiable on the basis of dissected males.The majority of the new records are in groups that have been recently revised, demonstrating the importance of curation and local insect surveys to the understanding of biodiversity, even for taxa and areas considered ‘relatively well-known’.