The taxonomic status of Lasiopogon montanus Schiner and L. bellardii Jaennicke is clarified. New diagnostic characters from the internal male genitalia conclusively separate the two species. In particular, the gonostylus apex is long and sickle-shaped in L. bellardii and shorter and toothed in L. montanus. Thus, L. bellardii is not a synonym of L. montanus as has usually been supposed, but is a distinct species found predominantly in the Alps, with only two specimens known from the Balkans. L. montanus is more widespread, ranging from the Alps east to Romania and south to Albania and Greece. Lectotypes of both species are designated.