A taxonomic study of four rare pteromalid genera: Amblyharma Huang & Tong, Fusta Xiao & Ye, Nazgulia Hedqvist and Platecrizotes Ferrière from the Eastern Palaearctic (Chalcidoidea, Pteromalidae, Pachyneurinae).

The four morphologically similar genera Amblyharma Huang & Tong, 1993, Fusta Xiao & Ye, 2015, Nazgulia Hedqvist, 1973 and Platecrizotes Ferrière, 1934 from the Eastern Palaearctic are reviewed. Redescriptions of genera and all available types of Eastern Palaearctic species are provided. An identification key to genera is given. A new species from South Korea, Platecrizotesjediisp. nov. is described and illustrated.

Review of the Palaearctic species of Miscogasteriella Girault, 1915 (Chalcidoidea, Pteromalidae).

Palaearctic species of the genus Miscogasteriella Girault, 1915 are reviewed. Miscogasteriellaolgaesp. nov. from South Korea and M.vladimirisp. nov. from Japan are described. Type material of M.nigricans (Masi) and M.sulcata (Kamijo) is redescribed and illustrated. Miscogasteriellanigricans is recorded from the Palaearctic region for the first time. An identification key to females of all Palaearctic species of Miscogasteriella is given.

The tribe Rhaconotini (Hymenoptera: Braconidae: Doryctinae) of South Korea, with description of a new Rhaconotus Ruthe species.

The genera and species of the tribe Rhaconotini are reviewed for the fauna of the Korean Peninsula. A new Rhaconotus species, Rh. koreanus sp. nov., is described and illustrated. The generic placement of the Oriental Rhyssalus striatulus Cameron is corrected and Ipodoryctes species described from China, overlooked in a recent publication on Rhaconotini, are reclassified. The following are new combinations: Rhyssalus striatulus Cameron, 1909 = Mimipodoryctes striatulus (Cameron, 1909) comb. nov.; Ipodoryctes guizhouensis Tang et Chen, 2011 = Rhaconotinus (Rhaconotinus) guizhouensis (Tang et Chen, 2011), comb. nov.; Ipodoryctes hebeiensis Tang et Chen, 2011 = Rhaconotinus (Rhaconotinus) hebeiensis (Tang et Chen, 2011), comb. nov.; Ipodoryctes rugosus Tang et Chen, 2011 = Rhaconotinus (Rhaconotinus) rugosus (Tang et Chen, 2011), comb. nov.; Ipodoryctes rutilans Tang et Chen, 2011 = Rhaconotinus (Rhaconotinus) rutilans (Tang et Chen, 2011), comb. nov.; Ipodoryctes wuyiensis Tang et Chen, 2011 = Rhaconotinus (Rhaconotinus) wuyiensis (Tang et Chen, 2011), comb. nov.; and Ipodoryctes liui Tang et Chen, 2011 = Rhaconotinus (Hexarhaconotinus) liui (Tang et Chen, 2011), comb. nov.

Review of species of the genus Heterospilus Haliday, 1836 (Hymenoptera, Braconidae, Doryctinae) from the Korean Peninsula.

This article reviews the species of the genus Heterospilus Haliday from South Korea. Nine species, Heterospiluschinjuensis sp. nov., H.gajwaensis sp. nov., H.heulriensis sp. nov., H.hyungkeunleei sp. nov., H.maseongus sp. nov., H.suriensis sp. nov., H taehoani sp. nov., H.weolchulsanus sp. nov., and H.yeogiensis sp. nov., are described as new to science. The species Heterospilusfujianensis Tang, Belokobylskij, He & Chen, 2013 is recorded for the fauna of Korea for the first time; H.ater Fischer, 1960 is synonymised under H.austriacus (Szépligeti, 1906). Heterospilusrubicola Fischer, 1960 and H.corsicus (Marshall, 1888) are excluded from the fauna of Korea. A key to all Heterospilus species known from the Korean Peninsula is compiled.

New species of the genera Bracon Fabricius and Syntomernus Enderlein (Hymenoptera, Braconidae, Braconinae) from South Korea.

Six new species, Bracon (Bracon) kimchanghyoisp. nov., B. (B.) yeogisanensissp. nov., B. (Habrobracon) allevatussp. nov., B. (Osculobracon) perspicillatussp. nov., Syntomernus flavus sp. nov., and S. scabrosus sp. nov. are described from South Korea and short keys for their identification are presented. The genus Ficobracon van Achterberg & Weiblen, 2000, syn. nov. is considered a junior synonym of Syntomernus Enderlein, 1920 and new combinations are proposed for Syntomernus asphondyliae (Watanabe, 1940), comb. nov., S. brusi (van Achterberg & Weiblen, 2000), comb. nov., S. codonatus (Huang & van Achterberg, 2013), comb. nov., S. kashmirensis (Maqbool, Akbar & Wachkoo, 2018), comb. nov., S. rhiknosus (Huang & van Achterberg, 2013), comb. nov., S. sunosei (Maeto, 1991), comb. nov. (= Bracon flaccus Papp, 1996, syn. nov.), and S. tamabae (Maeto, 1991), comb. nov.

New species of Euphorinae parasitoids of the family Braconidae (Hymenoptera) from South Korea.

Four new species of braconid parasitoids of the subfamily Euphorinae (Braconidae) from South Korea are described and illustrated, Centistes (Centistes) ahni sp. nov., Leiophron (Leiophron) pubiscutum sp. nov., Perilitus koreanus sp. nov. and Peristenus brunigaster sp. nov.