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夏天,人们在田间地头,常可看到一类有着绿色而柔软的身体,长着四个大而透明的翅膀的昆虫,缓慢地飞翔于空中,这就是著名的灭虫能手——草蛉。草蛉属于昆虫纲的脉翅目,这一目的昆虫全世界已知约5000种,中国记载近200种。绝大多数种类的成虫和幼虫均为肉食性,能够捕食蚜虫、蚁、螨等,所以其中不少种类在害虫的生态控制中起着重要作用。草蛉体壁通常柔弱,如柳絮一般,细长的身体有10毫米左右,翅阔,透明,看
In the summer, people often see a group of insects that have a green, soft body with four large, transparent wings flying slowly in the air. This is the famous insect exterminator - grass bream. Scirpus belongs to the order of the order Insecta, about 5,000 species known throughout the world for this purpose, and nearly 200 species in China. Most species of adults and larvae are carnivorous, predatory aphids, ants, mites, etc., so many of them play an important role in the ecological control of pests. The grass body wall is usually weak, such as catkins in general, slender body about 10 mm, wings wide, transparent, look