Abstract: To understand the presence，distribution，activity patterns，and potential to carry pathogens related to diseases such as equine piroplasmosis，Japanese encephalitis，vesicular stomatitis，Trypanosomiasis，West Nile virus，African horse sickness，equine infectious anemia，and equine encephalomyelitis（both Eastern and Western forms），in the unregulated equine disease zones of Conghua District in Guangzhou，we established a monitoring framework. Taking Conghua District as the core area，set up 8 surrounding districts and counties as monitoring areas to capture mosquitoes and insects for monitoring. Through 3 surveys in May，July and September，8，177 mosquitoes， 484 tabanids，655 midges and 529 ticks were caught. Among them，mosquitoes belong to 4 subfamilies，8 genera and 28 species，tabanids belong to 2 subfamilies，2 genera and 2 species，midges belong to 2 subfamilies，2 genera and 2 species，ticks belong to 1 subfamily，1 genus and 1 species. The dominant mosquitoes were culex brevicornis，Culex pseudosquemiculatus， Culex pipiens quinquefasciatus， chironomus， Tabanidae， Ceratopogonidae and Ixodes fanghead（Ixodes）. In May，3，678 mosquitoes were collected，with a mosquito density of 2.36 mosquitoes per light trap hour. In July，2，562 mosquitoes were captured，yielding a density of 1.64 mosquitoes per light trap hour. In September，1，937 mosquitoes were collected，with a density of 1.24 mosquitoes per light trap hour. The number and density of mosquitoes decreased from March to September. The average density of Tabanids was 6.2/field，average density of midges was 8.3/field，and average density of ticks was 8.3/field.

Key words: Mosquitoes, Mosquito Density, Population Dynamics

摘要： 为了解广州市从化区无规定马属动物疫病区内与马梨形虫病、日本脑炎、水泡性口 炎、伊氏锥虫病、西尼罗河热、非洲马瘟、马传染性贫血和马脑脊髓炎（东方和西方）等疫病传播 有关的蚊、虻、蠓、蜱等媒介生物的存在、分布及活动规律，以从化区为核心区，将周围8个区县 设置为监控区，捕获蚊虫进行监测。通过5月、7月、9月的3次调查，共捕获蚊子8 177只、虻虫 484只、蠓虫655只、蜱虫529只。其中蚊子隶属4亚科8属28种、虻虫隶属2亚科2属2种、蠓虫 隶属2亚科2属2种、蜱虫隶属1亚科1属1种。优势蚊虫为短须库蚊、伪杂鳞库蚊、致倦库蚊、 摇蚊、华广虻、蛾蠓和扇头蜱（硬蜱）。5月共采集蚊子总计3 678只，蚊密度为2.36只（/ 灯·小 时）；7月共采集蚊子共计2 562只，蚊密度为1.64只（/ 灯·小时）；9月共采集蚊子总计1 937只， 蚊密度为1.24只（/ 灯·小时），蚊子数量及密度从5月至9月呈下降趋势。虻虫平均密度为6.2 只/场、蠓虫平均密度为8.3只/场、蜱虫平均密度为8.3只/场，数量随季节变化不明显。

关键词: 蚊虫, 蚊密度, 消长规律