<i>Tipula (Yamatotipula) moesta</i> Riedel and related species in Finland (Diptera, Tipulidae)

We studied species of the moesta group of Tipula (Yamatotipula) found in Finland. The three species are redescribed and illustrated, and their morphology, distribution and ecology are discussed. Tipula moesta Riedel, 1919, is an arctic species found in northernmost Finland. Tipula chonsaniana Alexander, 1945, stat. rev., is here considered distinct from T. moesta and is reported for the first time from Finland and West Palaearctic region. It has a disjunct distribution: mountainous areas in the East Palaearctic and in the boreal coniferous zone in Finland. Tipula freyana Lackschewitz, 1936, is a widely distributed species in the Palaearctic region, which occurs in the northern boreal Finland in the coniferous zone. Female cerci and vaginal apodemes of T. moesta and of T. chonsaniana are illustrated for the first time.