黄足弓脊姬蜂Triclistus aitkini(Cameron,1897),属盾脸姬蜂亚科Metopinae。据过去报导,我国仅分布于台湾省(邱瑞珍,1962),现则贵州、云南亦有发现。过去该蜂无寄主记录,本文报导寄生于稻纵巷叶螟,是其寄主新记录。为便于识别,现将形态、习性及分布简况介绍于后。形态:该蜂体长约7毫米;前翅长约6毫米。头部两触角窝之间在中单眼下方,有一很高的片状突起,突起背方有一条很深的纵沟,此为本属的重要特征;头厚为宽的 Triclistus aitkini (Cameron, 1897) is a Metopinae of the subfamily Aedes. According to reports in the past, our country was only located in Taiwan Province (Qiu Ruizhen, 1962), but now Guizhou and Yunnan are also found. In the past the bee had no host record, this paper reports that the parasites on the rice alder, is its host of new records. For ease of identification, the morphological, behavioral, and distributional profiles are now introduced. Form: The bee is about 7 mm long; forewing about 6 mm. The head between the two antennal fossa below the monocular, there is a very high sheet-shaped protuberance, the back of the protuberance has a deep vertical groove, this is an important feature of the genus; head thickness is wide