Review of the genera Smicroplectrus Thomson, 1883 and Exyston Schiodte, 1839 (Hymenoptera: Ichneumonidae: Tryphoninae) of South Korea

Abstract

Two closely related genera, Smicroplectrus Thomson and Exyston Schiodte of the tribe Exenterini (Ichneumonidae, Tryphoninae) of South Korea are considered from collection of the Yeungnam University (YNU), Gyeongsan, Two species of Smicroplectrus were recorded before from Korea – Smicroplectrus erosus (Holmgren, 1857), and S. quinquecinctus (Gravenhorst, 1820) (Cha and Lee 1988). This material really includes 5 species of two genera of Exenterini: Smicroplectrus pedicellatus sp. nov., S. melanocerus sp. nov., S. actenon Kasparyan, 1976, Exyston clementi (Kerrich, 1952) and E. sibiricus (Kerrich, 1952). Three latter species are recorded for Korea for the first time. A new species, S. pedicellatus seems to be closely related to S. irroratus Kasparyan, 1990 from South of Russian Far East; both have pterostigma pale (brownish-yellow), and tergite 2 and 3 mainly smooth, with distinct punctures and without extensive scabrous sculpture typical of other species; by combination of two these characters both species can be distinguished from most other congeners. Unlike S. irroratus and S. melanocerus sp nov., in S. pedicellatus pedicel yellow ventrally and areolation of propodeum different. S. melanocerus is related to S. modestus Kasparyan, 1976 from Russia (Kunashir Island), but unlike to S. modestus has red coxae and apical half of antenna entirely blackish. Keys to species for both these genera occurring in South Korea are given. Smicroplectrus erosus (Holmgren, 1857) and S. quinquecinctus (Gravenhorst, 1820) are excluded from the South Korean fauna.