First record of the genus Palpostilpnus Aubert (Ichneumonidae: Phygadeuontinae) from Vietnam, with descriptions of eight new species.

Palpostilpnus Aubert, 1961 is a genus of the subfamily Phygadeuontinae (Hymenoptera: Ichneumonidae) with 17 currently recognized species from the Oriental and Australasian regions. In this paper, this genus is reported for the first time from Vietnam. Eight new species are described, comprising: P.

Two new species of Olesicampe Förster (Hymenoptera, Ichneumonidae) with a key to species known from China and Oriental Region.

Two new species of Olesicampe Förster, 1869, O. minense Sheng & Khalaim, sp. nov.

A new species of Dicaelotus Wesmael (Hymenoptera, Ichneumonidae, Ichneumoninae) parasitizing Asclerobia sinensis (Lepidoptera) in seed pods of Caragana spp.

A new species of Ichneumoninae, Dicaelotus caraganae Sheng & Li, sp. nov.,is described and illustrated.

First Oriental record of genus Neostroblia Heinrich (Hymenoptera, Ichneumonidae, Ctenopelmatinae) with description of one new species.

One new species, Neostroblia melana Sheng Watanabe sp. nov., collected from Fanjingshan National Natural Reserve, Guizhou Province, China, is reported.

The genus Megastylus Schidte (Hymenoptera, Ichneumonidae, Orthocentrinae) in China with a key to the species of China and Oriental Region.

Three new species of Megastylus Schidte, 1838 (Ichneumonidae, Orthocentrinae), M. (Dicolus) mentouense Sheng Li, sp. nov.

The genus Alcochera Frster (Hymenoptera, Ichneumonidae, Ctenopelmatinae) in China with a key to world species.

Two new species of Alcochera (Ichneumonidae, Ctenopelmatinae, Mesoleiini), Alcochera flavoclypeata Sheng Sun, sp. nov. collected from Labagoumen Natural Reserve, Huairou, Beijing, and A.

First record of the genus Aneuclis Förster (Hymenoptera, Ichneumonidae) from China.

A new species of the genus Aneuclis Förster, 1869, A. flavopedes Sheng, Zhou Wei, sp.nov.

A new species of Förster (Hymenoptera, Ichneumonidae) with a key to species known from China, Japan and South Korea.

A new species of the genus Förster, 1869, Sheng & Zhou, , collected from Zhangwu, Liaoning Province and Songshan National Natural Reserve, Yanqing, Beijing, China, is described and illustrated. A taxonomic key to the species of known in China is provided.

First record of the genus Microstenus Szépligeti (Hymenoptera: Ichneumonidae: Cryptinae) from China, with description of one new species and a key to world species.

The genus Microstenus Szépligeti, 1916 (Hymenoptera: Ichneumonidae: Cryptinae) is newly recorded from China based on a new species, Microstenus rufithorax Sheng, Li Sun, sp. nov., collected from Guangxi Zhuang Autonomous Region, Oriental part of China.

A review of the genus Apophysius Cushman (Ichneumonidae: Phygadeuontinae), with descriptions of six new species.

The phygadeuontine genus Apophysius (Ichneumonidae) is reviewed for the first time. Six new species are described, A. baolocensis Pham, Matsumoto Broad sp.

A new species of genus Endasys Förster (Ichneumonidae, Cryptinae) parasitizing Pristiphora (Tenthredinidae) and a key to species from China.

A new species of Cryptinae, Endasys pristiphorae Sheng, sp.n. reared from cocoons of the tenthredinid sawflies Pristiphora erichsonii (Hartig), P.

First record of Hylophasma Townes (Hymenoptera, Ichneumonidae, Cryptinae) from Palaearctic region.

A new species of Cryptinae, Hylophasma luica Sheng, Li Wang, sp.n., collected from Shandong Province, in the southern border of the Eastern Palaearctic Region of China, is described and illustrated.

Ichnoverruca nom. nov., a replacement name for the genus Verruca Sheng amp; Sun, 2018 (Hymenoptera, Ichneumonidae) non Schumacher, 1817.

The name Verruca was proposed for a new genus of wasps described by Sheng Sun (2018) with the type species Verruca dentia Sheng Sun, 2018 in the family Ichneumonidae (Hymenoptera). However, it cannot be used as a valid generic name due to homonymy as the genus Verruca was established by Schumacher (1817) in the barnacle family Verrucidae (Cirripedia, Verrucomorpha). Verruca Schumacher is a valid generic name in Verrucomorpha.

Taxonomic study of the genus Ozols (Hymenoptera, Ichneumonidae, Pimplinae) with description of a new species from China and a key to world species.

Five species of the genus Ozols are reported. One, Sheng & Li, collected from Liaoning province, China, is new to science. In addition, digital images and a taxonomic key to the all species of are presented.

A new species of genus Thomson (Hymenoptera, Ichneumonidae, Cryptinae) and a key to species from Oriental and Eastern Palaearctic regions.

A new species of Cryptinae, Sheng, Wang & Schwarz, collected from Qingdao, Shandong Province, in the north border of oriental part of China, is described and illustrated. A key to species known from the Oriental and Eastern Palaearctic regions is provided.

A new species and new records of the genus Förster (Hymenoptera, Ichneumonidae, Ctenopelmatinae) from Beijing with a key to Chinese species.

A new species, Sheng, , and two new records for China, (Uchida, 1952) and Uchida, 1930, collected in Mentougou, Beijing, belonging to the tribe Mesoleiini of the subfamily Ctenopelmatinae (Hymenoptera, Ichneumonidae), are reported. A key to the six species of known from China is given.

The genus Kriechbaumer in China, with descriptions of a new species and first record of the genus from Oriental region (Hymenoptera, Ichneumonidae, Banchinae).

Six species and two subspecies of the genus Kriechbaumer, 1894 are reported from China, of which one, Sheng, , is a new species and the first record of the genus from the Oriental Region. Kuslitzky, 2007 is a new Chinese record. A key to the species of occurring in China is provided.

Taxonomic notes on Exetastes fukuchiyamanus Uchida, 1928 (Hymenoptera, Ichneumonidae, Banchinae), with description of a new species from Japan and China.

Exetastes fukuchiyamanus Uchida, 1928 (Ichneumonidae, Banchinae) is redescribed and its taxonomic status and distribution in Japan and China is reviewed. A new species, E. compressus sp.

A new genus and species of subfamily Banchinae (Hymenoptera, Ichneumonidae) from China.

A new genus, Verruca Sheng Sun gen. nov., of the ichneumonid tribe Atrophini, subfamily Banchinae is described for one new species, Verruca dentia Sheng Sun, sp.

Discovery of the genus Förster in the Oriental Region (Hymenoptera, Ichneumonidae, Cryptinae).

The genus Förster, 1869 is newly recorded from the Oriental Region based on a new species, Sheng & Li, , collected from Jiangxi Province, in the oriental part of China. This species resembles (Uchida, 1930) from Japan in the coloration of flagellum and the structure and colouration of metasomal tergites, but it can be distinguished by the density and length of clypeal setae, the large propodeal spiracle, and the sculpture of area superomedia. Illustrations of and are provided.

A new species of Holmgren with a key to species known from China and the Eastern Palaearctic Region (Hymenoptera, Ichneumonidae, Poemeniinae).

A new species of Poemeniinae, Sun & Sheng, , is described and illustrated. Specimens were reared from twigs of Blume in Haicheng, Liaoning province, P.R.

A new species of Metopiinae (Hymenoptera, Ichneumonidae) parasitizing lepidopteran larvae in China.

A new species of Metopiinae, Sheng, , is described and illustrated. Specimens were reared from two species of Lepidoptera: (Ragonot, 1887) (Pyralidae) from Balong, Dulan, Qinghai Province, and an unidentified psychid (Psychidae) from Mukainor, Etuoke, Inner Mongolia Autonomous Region, China. The new species is characterized by a yellow face and clypeus, fore and middle femora and hind tibia mainly black, antennae slightly longer than head and mesosoma combined, with 17 flagellomeres, occipital carina entirely absent, and the hind femur being compressed, 2.

Contribution to the study of Chinese Tersilochinae (Hymenoptera: Ichneumonidae).

New data on Chinese Tersilochinae are provided: one species, Tersilochus scutatus sp. n., is described from Liaoning province of China and the Russian Far East, and two species, Barycnemis bellator (Müller) and Tersilochus curvator Horstmann, are new records from China.

Three new species of genus Sinophorus Förster (Hymenoptera, Ichneumonidae) parasitizing twig and defoliating Lepidoptera.

Three new wasp species are described from the subfamily Campopleginae (Hymenoptera: Ichneumonidae), Sinophorus bazariae Sheng, sp. n., reared from Bazaria turensis Ragonot (Lepidoptera, Pyralidae) in Dulan County, Qinghai Province, China, S.

A new parasitoid of Bazariaturensis (Lepidoptera, Pyralidae): Campoplexbazariae sp. n. (Hymenoptera, Ichneumonidae).

A new solitary endoparasitoid of the larva of Bazariaturensis Ragonot, 1887 (Lepidoptera, Pyralidae) in Qinghai province, China, Campoplexbazariae Sheng, sp. n., belonging to the subfamily Campopleginae (Hymenoptera, Ichneumonidae), is reported.