Perilampus neglectus and other neglected species: new records of Palaearctic Perilampidae (Hymenoptera, Chalcidoidea), with a key to European species of Perilampus

New faunistic records of Palaearctic Perilampidae (Hymenoptera: Chalcidoidea) are given, based on newly collected material in South-East Europe, South Korea and specimens from the Natural History Museum in London. Euperilampus Walker, 1871 is recorded for the first time in South Korea, with females of E. sinensis Bouček, 1978 being discovered and described for the first time. The genera Perilampus Latreille, 1809 and Steffanolampus Peck, 1974 are recorded for the first time in Greece. Perilampus noemi Nikol’skaya, 1952, collected on Crete and Salamina islands (Greece), is recorded for the first time in Europe. The following species are new to Greece: P. aeneus (Rossius, 1790), P. laevifrons Dalman, 1822, P. micans Dalman, 1820, P. minutalis Steffan, 1952, P. neglectus Bouček, 1956, P. ruficornis (Fabricius, 1793), P. tristis Mayr, 1905, and S. salicetum (Steffan, 1952). The following species are new to Romania: P. aeneus , P. auratus (Panzer, 1798), P. aureoviridis Walker, 1833, P. chrysonotus Förster, 1859, and P. laevifrons . The following species are new to Turkey: P. auratus , P. cephalotes Bouček, 1956, P. ruficornis , and P. tristis . Additionally, P. cephalotes and P. polypori Bouček, 1971 are new to Austria; P. masculinus Bouček, 1956 is new to Sweden; P. ruficornis is new to South Korea; and P. tristis is new also to Cyprus and Spain. The first host record for P. cephalotes and a new host record for P. laevifrons are also given. A key to 20 European species of Perilampus is included. Each species is diagnosed using macrophotography to facilitate its future recognition. The males of P. intermedius Bouček, 1956 and P. neglectus are described for the first time.