中文摘要：

为弄清洱海自然保护区水生半翅目特征，在实地调查和查阅资料的基础上，记录水生半翅目4科10种，并进行了区系分析。结果表明，洱海水生半翅目东洋区和古北区成份相近，分别占70％和80％，东洋一古北共有种占40％，东洋古北共有特性明显；在中国动物区划中，在西南区均有分布，在华北、华中和华南区也有较大比例分布，表明在中国分布较广。水生半翅目区系特点可能与水体环境相对稳定有关。

英文摘要：

In order to understand the character of aquatic Hemiptera in Erhai lake, based on field investigation and literature review, the fauna was studied. The results showed that in-sects of aquatic Hemiptera in Erhai Lake included 10 species of 4 families. Most species markedly presented the characters of oriental-palaearctic realm, and 7 species in oriental realm, 8 species in palaearctic realm, 4 species in oriental-palaearctic realm. In fauna of Chi-na, these species can be founded in southwest region, but many of them were distributed re-spectively in north, central and of south China.