草蛉——作为天敌,近年来国内外大量利用它来防治害虫。我国许多省区,对当地草蛉的繁殖和利用已作了不少研究工作。我们于1975年在天津红光农场果园对当地的草蛉进行过初步调查,并将采到的成虫、卵和幼虫分别在室内进行了饲养观察。依杨集昆先生编写的草蛉成虫检索表分别鉴定为大草蛉(Chrysopa septempunetata W.)、丽草蛉(C. formosa B.)、叶色草蛉(C. phylloehroma W.)和中华草蛉(C. cinica F.)计为四种草蛉。现将四种草蛉的卵、幼虫和茧的形态分别整理介绍如下: 一、卵卵粒椭园形,淡绿色,每粒卵皆附在一丝状卵柄的顶端,卵柄长度各种类不同(见表1)。卵粒于孵化前出现黑色条纹,被寄生的卵则为全黑色,不能孵化。不同种类有不同的产卵方式,但不论那种草蛉在产卵时一 Grasshopper - As a natural enemy, in recent years, extensive use of it at home and abroad to control pests. Many provinces and autonomous regions in our country have done a lot of research work on the propagation and utilization of the local weeds. In 1975, we conducted a preliminary investigation on the local grass weeds at the Red Orchard Farm in Tianjin. The collected adults, eggs and larvae were reared indoors. According to the search table of the grass 蛉 adults compiled by Mr. Yang Jikun, they were identified as Chrysopa septempunnetata W., C. formosa B., C. phylloehroma W. and C. sinensis C cinica F.) counted as four kinds of grass. Now four kinds of grass larvae of eggs, larvae and cocoon morphology were organized as follows: First, the oval egg oval, pale green, each egg are attached to the tip of a filiform egg-shaped handle, the length of the various types of egg-shaped handle Different (see table 1). Eggs appear black streaks before hatching, parasitized eggs are all black, can not hatch. Different species have different ways of spawning, but no matter what that kind of shrew is at the time of spawning