【摘要】 【目的】枫杨额潜叶蜂（Sinoscolia fengyang Wei et Niu）是近年北京地区景观树种枫杨的主要食叶害虫，为害后期造成枫杨大量叶片黄褐色斑枯、残缺或脱落，严重影响园林景观和生态环境。对该害虫的天敌资源进行调查与研究，发掘新的天敌种类，为推动其生物防治提供参考。【方法】在北京国家植物园北园采集枫杨额潜叶蜂幼虫为害叶并带回实验室，于室温条件下饲养获取寄生性天敌，并基于形态特征观察与线粒体COI基因序列分析对其进行分类鉴定。【结果】寄生枫杨额潜叶蜂幼虫的寄生蜂为曲纹姬小蜂属[膜翅目姬小蜂科（Eulophidae）]一新种，潜叶蜂曲纹姬小蜂（Closterocerus sioscoliae Jiang, Yao et Fu, sp. nov.），记述了该新种的形态特征，提供了雌雄性外部形态特征彩色图片和电镜照片，基于新种COI基因序列构建了曲纹姬小蜂属部分种类的系统发育树，进一步明确了新种的分类地位。【结论】本研究发现了膜翅目姬小蜂科曲纹姬小蜂属一新种，该新种寄生于园林害虫枫杨额潜叶蜂幼虫，是一种具有生物防治潜力的寄生性天敌。更多还原

【Abstract】 【 Objective】 Sinoscolia fengyang Wei et Niu is the major defoliator of the landscape plant species Pterocarya stenoptera in Beijing in recent years. Due to the damage of the pest, the host leaves occur a large number of yellowish-brown spotted, broken or defoliated ultimately, seriously threatening the healthy growth of P. stenoptera. In order to realize the sustainable management of the pest and protect the landscape and ecological environment of P. stenoptera, it is important to investigate the parasitic natural enemy resources of the pest, clarify the species, screen the dominant natural enemy species and carry out the application of biological control. 【Method】The damaged leaves by larvae of S. fengyang were collected from the north garden of Beijing National Botanical Garden, brought to the laboratory, and then were cultured at room temperature for the rearing of parasitoid wasp. When the adults emerged, they were collected, and specimens were examined based on the characteristics of traditional morphology and mitochondrial COI gene sequence. 【Result】A new parasitoid that parasitizes the larvae of S. fengyang was discovered, it belongs to the genus Closterocerus in the family Eulophidae(Hymenoptera), and here is named as C. sinoscoliae Jiang, Yao et Fu, sp. nov. The morphological characteristics of the new species were described in this paper. The color images and electron microscope photos of the external morphological characteristics of male and female were also provided. Meanwhile, based on the COI gene sequence of the new species, a phylogenetic tree with some other species of Closterocerus was constructed, and the taxonomic status of the new species was further clarified. 【Objective】In this study, a new species of the genus Closterocerus is discovered. It parasitizes the larvae of S. fengyang on P. stenoptera, and represents a potential parasitoid enemy for biological control.更多还原