Combivena gen.n (Hymenoptera: Ichneumonidae: Acaenitinae) from China.

Combivena Sheng & Sun, gen.n. and Combivena sulcata Sheng & Sun, sp.n. belonging to Acaenitinae of family Ichneumonidae (Hymenoptera), collected from Qinghai Province, China, are described and illustrated.

Xenoschesis Förster (Hymenoptera: Ichneumonidae) parasitizing webspinning and leafrolling sawflies with descriptions of four new species and a key to Chinese species.

Seven species of Xenoschesis Förster, 1869, are reported from China. Four species, X. (Polycinetis) inareolata Sheng & Sun, sp. n. from Liaoning Province, X. (Polycinetis) truncata Sheng & Sun, sp. n. from Liaoning, Jilin and Henan Provinces, X. (Xenoschesis) tianzhuensis Sheng & Sun, sp. n. and X. (Xenoschesis) weii Sheng & Sun, sp. n. collected in Anhui Province are new to science. One, X. (Xenoschesis) fulvipes (Gravenhorst) was reared from Acantholyda parki Shinohara & Byun and A. posticalis Matsumura, is new record for China. Xenoschesis (Xenoschesis) crassicornis Uchida was reared from A. erythrocephala (L.) and A. parki Shinohara & Byun. A key to species of Xenoschesis Förster known in China is provided.

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. and O. matouense Sheng & Khalaim, sp. nov., collected from Fujian and Jiangxi provinces of the Oriental part of China, are described and illustrated. A key to the species of Olesicampe known in China and Oriental region is provided.

Parasitoids of the sawfly, Arge pullata, in the Shennongjia National Nature Reserve.

Larvae of the argid sawfly, Arge pullata (Zaddach) (Hymenoptera: Argidae), feeds on leaves of birch (Betula spp.) in China, Europe, Siberia, and Japan. Parasitoids of A. pullata were studied in Shennongjia National Nature Reserve, Hubei Province, China, in 2009 and 2010. Five parasitoid species were found: Pleolophus suigensis (Uchida), Mastrus nigrus Sheng, Endasys parviventris nipponicus (Uchida) (Hymenoptera: Ichneumonidae), Vibrissina turrita (Meigen) (Diptera: Tachinidae) and Conura xanthostigma (Dalman) (Hymenoptera: Chalcididae). The average parasitism rate of A. pullata by parasitoids was as high as 11.0%. V. turrita was the dominant species, attacking 10.0% of the A. pullata cocoons. The emergence peak of V. turrita was from late May to early June. Three hyperparasitoids of V. turrita emerged from cocoons of A. pullata: Mesochorus ichneutese Uchida (Hymenoptera: Ichneumonidae), Pediobius sp. (Hymenoptera: Eulophidae), and Taeniogonalos maga (Teranishi) (Hymenoptera: Trigonalidae). Hyperparasitism rates were about 1.0% to 3.0%, with an average rate of 1.7%.

Lissonota holcocerica Sheng sp.n (Hymenoptera: Ichneumonidae) parasitizing Holcocerus hippophaecolus (Lepidoptera: Cossidae) from China.

This paper describes Lissonota holcocerica Sheng sp.n. (Hymenoptera: Ichneumonidae), parasitizing Holcocerus hippophaecolus Hua, Chou, Fang and Chen (Lepidoptera: Cossidae) in Inner Mongolia, Liaoning, and Ningxia, China. The adults of L. holcocerica emerge from a cocoon during the daytime, mostly from 09:00 to 14:00 hr, then start calling and mating, mostly from 08:00 to 12:00 hr. Mating lasts from 15 sec to 15 min. The longevity of males is 5.8 ± 2.4 days, whereas for females longevity is 7.6 ± 4.6 days in the field. Nutritional supplements can significantly extend the life span of L. holcocerica. Mated females search for hosts by walking on the base of Hippophae rhamnoides L. (Rosales: Elaeagnaceae) stem infested by Ho. hippophaecolus, vibrating their antennae and tapping while searching the stem for oviposition sites. Parasitized cocoons of Ho. hippophaecolus collected in field were half the size of normal ones or even smaller.

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. A key to species of Neostroblia known in the world is provided. A key to similar genera of Mesoleiini is also provided.

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. Specimens were reared from the cocoon of Asclerobia sinensis (Caradja, 1937) (Lepidoptera, Pyralidae), from Hangjinqi, Inner Mongolia Autonomous Region, China. The new species is characterized by face very short, median length shorter than clypeus; clypeus 2.9 × as wide as long, apical margin with weak median convex; area basalis of propodeum very short, lateral carinae indistinct; hind coxa partly irregularly black; fourth and subsequent metasomal tergites black. A key to species of Dicaelotus known in China is provided.

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. collected from Mentougou, Beijing, M. (D.) flavicornis Sheng Li, sp. nov. from Shennongjia National Natural Reserve, Hubei and M. (Megastylus) yindianense Sheng Li, sp. nov. from Minquan, Henan, are described and illustrated. A taxonomic key to the species of Megastylus known from China and the Oriental Region is provided.

A new genus and species of Brachyscleromatinae (Hymenoptera: Ichneumonidae) from China, Laxiareola ochracea.

Laxiareola Sheng and Sun, gen.nov. and Laxiareola ochracea Sheng and Sun, sp.nov. belong to Brachyscleromatinae of the family Ichneumonidae, from the Jiangxi Province in China, are described in the present study. A key to the genera of Brachyscleromatinae is given.

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. truncata Sheng Sun, sp. nov. from Wugongshan Natural Reserve, are described and illustrated. An updated taxonomic key to world species of Alcochera is provided.

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. collected from the field of the Research Station of Liaohe-River Plain Forest Ecosystem, Zhangwu, Liaoning Province, China, is described and illustrated. The new species is inserted into the key provided by Khalaim (2004).

The species of Rhimphoctona (Xylophylax) (Hymenoptera: Ichneumonidae: Campopleginae) parasitizing woodborers in China.

Four species of Rhimphoctona (Xylophylax) collected from P. R. China are reported. Two of them are new to science: Rhimphoctona (Xylophylax) maculifemoralis Luo and Sheng, sp.nov. reared from Tetropium castaneum (Linnaeus), and Rhimphoctona (Xylophylax) immaculata Luo and Sheng, sp.nov. One is a new record for China, R. (Xylophylax) rufocoxalis ( Clément 1924 ) reared from T. castaneum (Linnaeus). The other is R. (Xylophylax) lucida ( Clément 1924 ) reared from Monochamus saltuarius Gebier, Tetropium gabrieli Weise and Asemus sp. A key to species 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. Illustrations of the new species are provided. A key to the world species of this genus is also provided.

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. xibei Wei Xia and P. (Stauronematus) compresicornis (Hartig) in Ningxia, Shandong and Shan'xi, China, is described and illustrated. A key to species of Endasys known from China is provided.

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. nov., A. constrictus Pham, Matsumoto Broad sp. nov. and A. taynguyenensis Pham, Matsumoto Broad sp. nov. from the Central Highlands of Vietnam, A. latus Pham, Matsumoto, Konishi, Sheng Broad sp. nov. from China and Vietnam, A. takasukai Pham, Konishi Broad sp. nov. from the Cameron Highlands, Malaysia, and A. pentaceratops Broad sp. nov. from Sarawak, Malaysia. A key to the nine known species of the genus Apophysius is included.

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

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

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.

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

A new species of Cryptinae, Hoplocryptusqingdaoensis Sheng, Wang & Schwarz, sp. nov. 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.

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. The new species is placed within the existing key to species.

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

A new species, Alexeterbeijingensis Sheng, sp. nov., and two new records for China, A.angularis (Uchida, 1952) and A.shakojiensis 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 Alexeter known from China is given.