The Palaearctic species of Myiocephalus Marshall, 1898 (Braconidae, Euphorinae) are revised and a new species (M. zwakhalsi sp. n.) from Austria is described and illustrated. A key to the Palaearctic species is provided. Myiocephalus niger Fischer, 1957, is a new record for China and the Nearctic Myiocephalus laticeps (Provancher, 1886) is re-instated as valid species. A lectotype is designated for Aphidius hedini Fahringer, 1929.
The intra-specific variation of two species of Helorus Latreille (Hymenoptera, Heloridae) from NW China is studied and for the first time the sexual variation in Chinese Helorus species is described. Both sexes of Helorus antefurcalis He & Xu, 2015 (new for Shaanxi) and H. caii He & Xu, 2015 (up to now only known from one male), are described and illustrated. Helorus xinjiangensis He & Xu, [June] 2015, is a new junior synonym of H. alborzicus Izadizadeh, van Achterberg & Talebi, [April] 2015 and H. elgoni Risbec, 1950, is re-instated as valid species. A revised key to the Old World species of Helorus Latreille (except Australian region) is included.
The world genera of the Bobekia-group of Alysiini (Braconidae: Alysiinae) are reviewed and keyed. A new genus (Neodiastagen. nov.) is proposed for Phasmidiasta ecuadorensis Fischer, 2006, from Ecuador. One new subgenus (Parabobekoidessubg. nov.; type species Separatatus (Parabobekoides) yinshanisp. nov. from NW China) is described and illustrated. Neosymphanes Belokobylskij, 1998 is a new synonym of Bobekia Niezabitowski, 1910 (syn. nov.).
Five new species of the genus Utetes Foerster, 1863 (Hymenoptera, Braconidae, Opiinae) are reported from Shaanxi and Ningxia provinces (NW China). The new species (U. aharmus sp. n., U. elongisulcus sp. n., U. karsius sp. n., U. stenotus sp. n. and U. subrosae sp. n.) are keyed and fully illustrated. Opiognathus pratensis (Weng Chen, 2005) comb. n., Apo-desmia punctata (Chen Weng, 2005) comb. n. and Phaedrotoma saltator (Telenga, 1950) comb. n. are new combinations.
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