长距茧蜂(Macrocertrus sp.)分布广泛,发生数量稳定,适应性强,遍布于温带及亚热带。在调查地区中,只要有松梢螟分布的地区都有长距茧蜂,甚至在松梢螟幼虫极少或幼树零星生长的地区也有长距茧蜂寄生。是一种有利用价值的天敌昆虫。为此,我们在进行松梢螟调查期间,同时也进行了长距茧蜂的发生概况调查,其结果扼要叙述于下,供参考。 Macrocertrus sp. Has a wide distribution and occurs in a stable quantity and adaptability. It is found in temperate and subtropical regions. In the surveyed area, B. longibracteata was present in all the areas where the pine needles were distributed, and even in the sporadic areas of the pine needles or young trees. Is a value of natural enemies of insects. To this end, we conducted during the investigation of pine needles, but also conducted a survey of the occurrence of long-braided bee, the results briefly described below, for reference.