Nesomesochorinae is a rather small subfamily of Darwin wasps (Insecta: Hymenoptera: Ichneumonidae), only with three described genera. We recognize a fourth nesomesochorine genus from Perú and describe it as a new genus, Bina Shimizu & Alvarado gen. nov. The new genus is distinguished from previously described genera of Nesomesochorinae by the following combination of character states: mandible parallel-sided proximally and abruptly strongly narrowed ventroapically so that its lower apical tooth is much smaller and sharper than upper tooth; propodeum with lateromedian longitudinal carinae between anterior and posterior transverse carinae developed on more than posterior 0.9 so that the area superomedia is more or less enclosed; thyridium of 2nd metasomal tergite sometimes very large; 1st metasomal tergite stout and arched; body highly shiny. Binagen. nov. comprises two species also described as new to science: B. huayrurae Shimizu & Alvarado sp. nov. (type species of Binagen. nov.) and B. nigra Shimizu & Alvarado sp. nov. Identification keys to genera of Nesomesochorinae and to species of Binagen. nov. are provided.

Nesomesochorinae是达尔文黄蜂的一个相当小的亚科（Insecta：膜翅目：Ichneumonidae），只有三个属。我们认识到秘鲁的第四个线粒体胆碱属，并将其描述为新属，Bina Shimizu和Alvarado属。十一月该新属与先前描述的猪笼草属通过以下特征状态的组合相区别：下颌平行侧近端，并突然强烈地缩小心室，因此其下根尖比上齿小得多且尖锐。在前和后横向隆突之间具有近海纵突的隆突的前突大于0.9，因此超中部区域或多或少被封闭；第二个变质黄铁矿的甲状腺有时非常大；第1变种质三重性黑啤酒坚固和拱形；身体极富光泽。Bina gen。十一月 由两个也被描述为科学新物种的物种组成：B. huayrurae Shimizu和Alvarado sp.。十一月 （比纳的类型种类gen。十一月 ）和B. nigra Shimizu＆Alvarado sp。十一月 Nesomesochorinae属和Bina属物种的鉴定关键。十一月 提供。