A review of South Korean Alloplasta Förster (Hymenoptera: Ichneumonidae: Banchinae) with description of a new species.

South Korean Alloplasta species were examined in this study. Prior to this study, only A. longipetiolaris of this genus was previously known from South Korea. Four species are new records, A. kuslitzky, A. nigripes, A. maruyamana and A. subgrisea, and A. brevipetiolaris sp. nov. is described as new to science. Furthermore males of two species, A. kuslitzky and A. subgrisea, are described for the first time. An illustrated identification key is provided for the Alloplasta species known from South Korea.

Cryptopimpla (Hymenoptera, Ichneumonidae, Banchinae) of South Korea, with description of two new species.

The genus Cryptopimpla Taschenberg is recorded for the first time in South Korea. Four species are recognized; among these, two species, C.aspeculosus Kang & Lee, sp. n. and C.pentagonalis Kang & Lee, sp. n., are described as new to science. For the other two species, C.brevigena Kuslitzkii and C.carinifacialis Sheng, the males were hitherto unknown and are described here. An illustrated identification key is provided for the species of Cryptopimpla known from South Korea.

A new species of Monoblastus Hartig, 1837 (Hymenoptera: Ichneumonidae: Tryphoninae) from South Korea.

A new ichneumonid species, Monoblastus koreensis sp. nov. is described from South Korea. New data on the taxonomy and distribution of M. clauseni (Uchida), M. erythrurus Townes et al. and M. nigriventus Lee Cha are given. The taxonomic position of M. nigriventus and its similarity to M. ermolenkoi Kasparyan from Russian Kuril Islands is discussed. All these species are keyed and illustrated. Erromenus alpinator Aubert sensu Lee Cha (= Monoblastus koreensis sp. nov.) is excluded from the fauna of South Korea.

Two new species of Leptobatopsis Ashmead (Hymenoptera: Ichneumonidae: Banchinae) from South Korea and gynandromorphy in L. nigricapitis.

Four species of Leptobatopsis Ashmead are recorded for the first time from South Korea. Among them, L. koreana sp. nov. and L. daedeokensis sp. nov. are newly described. We also report two newly recorded species, L. nigricapitis Chandra & Gupta and L. appendiculata Momoi, from South Korea. In addition, we describe a case of gynandromorphy of L. nigricapitis in a single specimen from South Korea. This specimen presents bilateral asymmetry, with the left half of its habitus displaying male characters and the right half displaying female characters. We also provide a key to Eastern Palaearctic species of Leptobatopsis.