A new aleocharine species, Euvira micmac Klimaszewski and Majka, sp. nov., from Nova Scotia, Canada, is described and illustrated. This is the first record of the genus Euvira for Canada. New data on bionomics and distribution are provided, including notes on the red oak gall environment where the species was found. A short diagnosis, description, colour habitus image, and black and white genital images are provided. The lectotype (male) and the paralectotypes (5 females) are designated for E. quadriceps (Casey). Two beetles, Litargus tetraspilotus LeConte (Mycetophagidae) and Melanophthalma americana (Mannerheim) (Latridiidae), found co-inhabiting red oak galls are newly recorded for Atlantic Canada.