In the present paper, the writers attempt to deal with the problem of the delimitation of the boundaries of zoogeographical regions in Henan on the basis of the mosquitoes fauna of the province.rnAmong the 10 genera and 67 species of mosquitoes listed, 40 species (or 59.7% ) belong to the species entirely or mainly distributed in the Oriental region, 15 species (or 22. 4% ) to those entirely or mainly distributedin the Palaearctic region, and 12 species (or 17.9%) to those distributed in both Oriental and Palaearctic region. Palaearctic species of mosquitoes in Mt. of noeth - westen and Huonghuai plain and Nanyang basin have advantages over those in Henan Province, Oriental species of mosquitoes in Mt. of eouth - westen and Mt. of south have advantages over those in Henan Province. Basing on the comparison with the mosquitoes fauna of the adjacent provinces, including Hunan, Hubei, Hebei, fauna of mosquitoes in Henan have more Hubei, characteristics of Palaearctic region, but the mountainous region of South - western and mountainous region of South parts should be included in the Oriental region. The dividing line between Palaearctic region and Oriental region is from Shangluo county of Shaanxi to Lushan county of Henan via the highest peak of Mt. of Funiu and then from west edge of Nanyang basin to Mt. of Wudang in Hubei Province and extension towards Mt. Tongbai and Mt. Dabie.%河南地区已发现蚊类10属67种,其中属于东洋界种类40种,占59.7％；属于古北界种类15种,占22.4％；广布两界种类有12种,占17.9％.研究表明,河南地区蚊类区系基本应划归古北界,但豫西南山区及豫南山区划归东洋界较合理.蚊类区系古北界与东洋界在秦岭以东分界线在河南地区的走向,由陕西商洛向东入豫后经伏牛山主峰达鲁山后,延南阳盆地西缘至湖北武当山向东经桐柏山、大别山向东.
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