Four genera of the subfamily Opiinae Blanchard (Hymenoptera, Braconidae) new for Japan, with the description of two new species.

Four genera are reported for the first time from Japan (Areotetes van Achterberg & Li, 2013, Indiopius Fischer, 1966, Neopius Gahan, 1917 and Sternaulopius Fischer, 1965), and keys are provided for the species of these genera. Two new species are described and illustrated: Areotetesconvergens sp. nov. and Sternaulopiusmaculiferus sp. nov.

Four new species of the genus Xynobius Foerster (Hymenoptera, Braconidae, Opiinae) from South Korea.

Four new species, Xynobiusazoniussp. nov., X.brevifemorasp. nov., X.duoferussp. nov., and X.stipitoidessp. nov., are described and illustrated, and one species X.geniculatus (Thomson, 1895) is newly reported from South Korea. Xynobiusgeniculatus (Thomson, 1895) is redescribed and illustrated, and a new combination, Xynobius (Stigmatopoea) cubitalis (Fischer, 1959), comb. nov. is suggested. An identification key to the Xynobius species known from South Korea is provided.

Two new Palaearctic species of Xynobius Foerster (Hymenoptera, Braconidae, Opiinae).

Two new and very similar species of the genus Xynobius Foerster, 1863 are described and illustrated, X.subparallelus Han & van Achterberg, sp. nov. from Japan (Honshu) and X.setosiscutum van Achterberg, sp. nov. from Norway. Three species are newly reported from Norway: Xynobiusaciculatus (Thomson, 1895), X.comatus (Wesmael, 1835), and X.polyzonius (Wesmael, 1835). X.polyzonius (Wesmael, 1835) and X.sapporanus (Fischer, 1963) are new combinations. Identification keys to the Xynobius species known from Norway and Japan are added.

A new species of the genus Hylcalosia Fischer (Hymenoptera: Braconidae: Alysiinae) from South Korea, with a key to the Korean species.

The species of the genus Hylcalosia Fischer, 1967 (Braconidae: Alysiinae) from South Korea are revised. One species, Hylcalosiabicolor sp. nov., is new to science. They are described and illustrated herein and an identification key to the Korean species is added. In addition, the DNA barcode region of the mitochondrial cytochrome c oxidase subunit I (COI) has been analysed for the new species and H.sutchanica is used for genetic comparison.