自然界的昆虫分为有益和有害两大类别。近一、二十年,世界各国愈来愈重视自然保护问题,除制定法律保护稀有鸟兽外,也开始保护有观赏价值的稀有昆虫。天牛科中有一个属,因其色泽艳丽、斑纹鲜明,故命名为蔷薇花 Rosalia,称为丽天牛属。分布于欧洲、老挝、日本、中国等地。已知该属有五、六个种,其中兰丽天牛居首位。其斑纹大小、形状和色彩多变,有 Insects of nature are divided into useful and harmful two categories. In the past one or two decades, all countries in the world have paid increasing attention to the issue of nature conservation. Apart from enacting laws to protect rare animals and birds, they have also started to protect rare ornamental value insects. Cerambycidae has a genus, because of its bright color, streaks distinctive, so named Rosalia Rosalia, known as the genus Lagurus. Distributed in Europe, Laos, Japan, China and other places. It is known that there are five or six species, of which Lan Li Tianniu ranks first. The stripe size, shape and color change, there