EN
A redescription of Leptus phalangii (De Geer, 1778) (= L. nemorum (C. L. Koch, 1836), syn. nov., = L. beroni Fain, 1991, syn. nov.) based on adults, deutonymphs and larvae, is supplemented with data on life cycle and ecology of the species. Larvae of L. phalangii developed, under laboratory conditions, into deutonymphs of L. nemorum, species hitherto known only from active postlarval forms. A field-collected female of L. phalangii is designated as the neotype.