本文报道的九种捕食性天敌昆虫(分属2目6科),是本省农田常见种类,经我们在田间和室内观察,已证实它们可捕食某些作物害虫,对抑制害虫的发生可以起到积极作用。但由于过去很少研究,尚未引起人们的注意。兹将调查研究的结果报导如下。膜翅目Hymenoptera 蚁科Formicidae 蚂蚁是常见的昆虫之一,成虫小型至中等大,体长0.5—25mm,为群居性的多型性昆虫。体躯分节明显,平滑或有毛、刺、条纹、网纹及瘤突等。头部变化大,一般大而宽,有的兵蚁头部较胸、腹部大,头部能自由活动。雌蚁、职蚁的触角膝状,雄蚁的简单,4—13节,节柄甚长。复眼小,偶有缺如,雄蚁单眼发达,雌蚁,特别是职蚁单眼常退化或消失。上唇痕跡状;上颚变化大, Nine predatory natural enemies (belonging to 2 orders and 6 families) reported in this paper are common species of farmland in our province. After we observed them in the field and indoors, they have been shown to prey on some crop pests and can inhibit the occurrence of pests positive effects. However, due to the lack of research in the past, no attention has been drawn to it. The survey results are reported below. Hymenoptera Hymenoptera Formicidae Formicidae Ant is one of the common insects, adult small to medium-sized, body length 0.5-25mm, for the polygamous sex insects. Body section obvious, smooth or hairy, thorns, stripes, lines and knobs and so on. Big changes in the head, the general large and wide, some soldiers ants head chest, abdomen, the head can move freely. Female ants, termite antennal knee, male ants simple, section 4-13, very long handle. Compound eyes small, occasionally lacking, male one-eyed developed, female ants, especially single-eyed workers often degenerate or disappear. Upper lip marks; large changes in the palate,