Redescription of <i>Psocus flavonimbatus</i> Rostock (Psocoptera: Psocidae) from Finland

About 120 years since its original description from Estonia (region of lake Peipus) the enigmatic species Psocus flavonimbatus Rostock, 1879 has been rediscovered in semi-natural spruce-dominated forests in Kuhmo, Central Finland. The species, which had tentatively been synonymized with Loensia variegata (Latreille, 1799), is here reinstated. Coloration and general morphology of both sexes and terminalia of females are described and illustrated. Unfortunately the few males available are all damaged, lacking abdomen. Without information on male terminalia it is impossible to assign the species to one of the modern genera of Psocidae. Therefore, it is here retained in the genus Psocus, pending further studies.