This species is usually known as bistortata; the other taxon, aka crepuscularia or (in the Finnish List) sp., has been reported from Finland by Esko Suomalainen. The latter taxon is very rare in Finland and its validity as a good species is questionable.
Finland, U: Espoo, ex larva June 2000, Leg: K. Silvonen
Photo: 28 July 2000 © Kimmo Silvonen
Finland, EH: Hämeenkoski (Koski Hl), ex ovo July 1987, Leg: K. Silvonen
Photo: 9 Sept. 1987 © Kimmo Silvonen