Caliroa dionae Smith and Moisan-De Serres, n. sp., is described from Quebec. The species was reared from larvae feeding on highbush blueberry, Vaccinium corymbosum L. (Ericaceae) and is the first North American record of a species of Caliroa feeding on Vaccinium. It is distinguished from other North American Caliroa species and from Palearctic species of Caliroa that feed on Vaccinium.