Revision of the mining bee subgenus Andrena (Longandrena) (Hymenoptera: Apoidea: Andrenidae).

All three hitherto described species of the Palearctic subgenus Andrena (Longandrena Osytshnjuk, 1993), are revised and redescribed. This subgenus is characterized by an unusually long glossa, a rare character among short-tongued bees. A revised diagnosis of this subgenus is given.