New records of Canadian Aleocharinae (Coleoptera, Staphylinidae)

New records are reported for 53 species of Canadian aleocharines. Eighty-eight new Canadian provincial records (nine from Alberta, 11 from British Columbia, eight from New Brunswick, 23 from Nova Scotia, one from the Northwest Territories, 27 from Ontario, one from Prince Edward Island, and eight from Québec) are provided as well as six new state records from the United States (three from Alaska, two from Washington, and one from Oregon). Of these, six species including Aleochara (Xenochara) quadrata Sharp, Gnathusa eva Fenyes, Phymatura blanchardi (Casey), Aloconota sulcifrons (Stephens), Myrmedonota aidani Maruyama and Klimaszewski, and Pella caliginosa (Casey) are newly recorded in Canada. These new records are examined in the context of what insights they provide in relation to the distribution and biogeography of the Canadian aleocharine fauna