A new species of the genus Mesopolobus Westwood, Mesopolobus robiniae sp. n., is described and illustrated from east-central Europe (Romania and Hungary). The species was reared from black locust (Robinia pseudoacacia) seedpod samples, where it most likely parasitizes the black locust’s seed predator Bruchophagus robiniae Zerova, 1970. Here we present the new species and report on its ecological relationships within the European seed predator community of black locust. We also give details regarding type material and type locality, a detailed description with images, a differential diagnosis of the new species, and a modification to the identification key published by Graham (1969), that distinguishes this new species from closely related species. In addition, we provide information on the distribution, biology and results of barcoding analysis. We also provide the DNA sequence data to complement the morphological taxonomy.

中文翻译：

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黑刺槐作物的一种新物种（中膜翅目，翼手目）

Mesopolobus Westwood属的一种新种，Mesopolobus robiniae sp。n。是从中东欧（罗马尼亚和匈牙利）进行描述和说明的。该物种是从刺槐（Robinia pseudoacacia）种子荚样本中饲养的，极有可能寄生于刺槐的种子捕食者布鲁氏布鲁氏菌Zerova，1970年。在这里，我们介绍新物种，并报告其在欧洲刺槐种子捕食者群落中的生态关系。我们还提供有关类型材料和类型局部性的详细信息，带有图像的详细说明，对新物种的鉴别诊断以及对Graham（1969）发布的识别码的修改，以区分该新物种与紧密相关的物种。此外，我们提供有关条形码分析的分布，生物学和结果的信息。我们还提供了DNA序列数据以补充形态分类学。