中文摘要：

记述毛链金小蜂属（膜翅目：金小蜂科）1新种：叶瘿蚊毛链金小蜂，对新种的外部形态特征进行详细描述。该种寄生于刺槐叶瘿蚊（双翅目：瘿蚊科）幼虫-蛹。刺槐叶瘿蚊是我国新近发现的外来有害物种，对我国刺槐林造成重大危害。模式标本保存于中国林业科学研究院昆虫标本馆。

英文摘要：

A new species of genus Systasis Walker （Hymenoptera： Pteromalidae）, Systasis obolodiplosis Yao et Yang, sp. nov., was found in China and was described in this paper. The new species is a parasitoid of larvae-pupae of locust gall midge Obolodiplosis robiniae （Haldemann）（Diptera： Cecidomyiidae） which is a newly invaded serious insect pest in China. Systasis obolodiplosis can be regarded as a potential natural enemy agent for biological control of this pest. Morphological characters are depicted in details and partially illustrated here. Type specimens are deposited in Insect Museum Collection of Chinese Academy of Forestry.