摘要： 蜻蜓目昆虫既作为天敌昆虫又作为药用和食用的资源昆虫，在人们的日常生活中扮演着重要的角色，其稚虫生活在水中，可作为水污染程度的一种生物指标，对环境监测有着重要的意义。为了进一步探讨蜻蜓的生物学特征，本文作者对蓝额疏脉蜻（成虫尤其是稚虫）的形态学特征进行了详细的观察与描述，主要通过野外采集蜻蜓稚虫、饲养蜻蜓稚虫、拍照、照片处理、形态描述、文献检索、归纳、总结等方法完成。

关键词： 蜻蜓； 蓝额疏脉蜻； 形态学特征

Abstract ：Odonata insects as natural enemies and as both medicinal and edible resource insects, in people's daily life plays an important role, the naiads live in the water, can be used as water pollution degree of a biological indicator for environmental monitoring, has important significance. In order to further investigate the dragonfly's biological characteristics, the author of this article on blue dasher ( adult especially naiads ) morphological features were observed in detail and description, mainly through the field acquisition Dragonfly nymph, breeding Dragonfly nymph, photography, photo processing, morphological descriptions, literature retrieval, Baconian, summary method.

Keywords ：dragonfly, Brachydiplax chalybea Brauer, Morphological characteristics