ABSTRACT The endemic New Zealand cyclostome braconid wasp genus Metaspathius Brues, which was previously only known from a single specimen, an apterous female, is revised. Four new species, including three with fully winged females, are described and illustrated: Metaspathius chathamicus Ward, sp. nov.; M. hemipterus Belokobylskij, sp. nov.; M. kuscheli Ward & Belokobylskij, sp. nov.; and M. sharkeyi Quicke & Butcher, sp. nov. Metaspathius apterus Brues is illustrated. The first host record for the genus is provided: Metaspathius kuscheli sp. nov. is recorded as a larval parasitoid of the New Zealand endemic weevil Phrynixus astutus Pascoe, 1876 (Curculionidae). DNA sequence data (CO1 and 28S) for two of the species are included in an analysis of a broad range of cyclostome Braconidae with emphasis on basal taxa. The results show that Metaspathius belongs to a clade restricted to New Zealand within the heterogeneous basal subfamily Mesostoinae van Achterberg, 1975. A revised morphological diagnosis of the Mesostoinae is presented in the light of the discovery that Metaspathius is a member. The relationships of the Maxfischeriinae are discussed in the light of molecular findings. http://www.zoobank.org/urn:lsid:zoobank.org:pub:512AD512-5F2A-44C8-9951-AD739995C10C

中文翻译：

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新西兰特有的带头蜂属 Metaspathius 的修订：新的亚科定位，以及四种新物种的描述，包括三个具有全翅雌性的物种（膜翅目：蜂科：Mesostoinae）

摘要 新西兰特有的圆口蚴黄蜂属 Metaspathius Brues 以前仅从一个无翅雌性个体标本中获知，现在已被修订。四个新物种，包括三个全翅雌性，被描述和说明：Metaspathius chathamicus Ward，sp。十一月；M. hemipterus Belokobylskij, sp. 十一月；M. kuscheli Ward & Belokobylskij, sp. 十一月；和 M.sharkeyi Quicke & Butcher, sp。十一月 说明了 Metaspathius apterus Brues。提供了该属的第一个宿主记录：Metaspathius kuscheli sp。十一月 被记录为新西兰地方性象鼻虫 Phrynixus astutus Pascoe, 1876 (Curculionidae) 的幼虫寄生蜂。其中两个物种的 DNA 序列数据（CO1 和 28S）包含在对广泛的圆口虫科的分析中，重点是基础分类群。结果表明 Metaspathius 属于一个仅限于新西兰的分支，属于异质基底亚科 Mesostoinae van Achterberg，1975 年。根据 Metaspathius 是一个成员的发现，提出了对 Mesostoinae 的修正形态学诊断。根据分子发现讨论了 Maxfischeriinae 的关系。http://www.zoobank.org/urn:lsid:zoobank.org:pub:512AD512-5F2A-44C8-9951-AD739995C10C