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许多种蚊虫的成虫,在夏天天气炎热的时候白天常喜欢在井内栖息。根据我们1954年7、8月份在陕西省长安县一带农村里作防疫工作的调查,在井内捉到的蚊虫,经初步分类计有尖音库蚊淡色变种、乏倦库蚊、三节吻库蚊、富氏罗蚊、高原疟蚊等种,其中以尖音库蚊为数最多。这些蚊虫多半系早晨太阳未出之前进入井内,下午傍晚日落之前一小时开始向外飞逸,约一小时左右即可全部飞出。在中午的时候即令用木棍在井内加以骚扰,蚊虫并不飞出,偶而少数飞出井口,又很快飞回井内。我们调查了115个不同性质的井,包括饮水水井、枯乾废井、灌溉用的水井、贮菜的窑井等。其中有盖而不严密的44个水井中29个有蚊虫栖息;19个饮水水井中9个有蚊虫栖息;20个无盖水井中19个有蚊虫栖息;32个无盖枯井中全部都有蚊虫栖息。由此可以看出各种类型的井都可为蚊虫
Adults of many species of mosquitoes habitually inhabit wells during the summer when the weather is hot. According to our survey conducted in July and August 1954 in the rural area of Chang’an County in Shaanxi Province, the mosquitoes caught in the well were classified as Culex pipiens pallens pastel varieties, Culex quinquefasciatus, , Fu Luo Mosquitoes, plateau anopheles mosquitoes and other species, of which Culex pipiens pallens mosquito is the largest number. Most of these mosquitoes entered the well before the sun came out in the morning, and flew outward one hour before sunset in the afternoon and evening, and all of them flew in about an hour or so. At noon, even when using wooden sticks to harass the well, the mosquitoes do not fly out, occasionally flew a few out of the wellhead and flew back into the well again. We surveyed 115 wells of different types, including drinking water wells, dry-weeds, irrigation wells, kiln wells for storage of vegetables, and the like. Among them, 29 mosquitoes were found in 44 covered wells but not tight ones; 9 mosquitoes were perched in 19 drinking water wells; 19 mosquitoes were perched in 20 uncovered wells; and mosquitoes were found in 32 uncovered dry wells Habitat. From this it can be seen that various types of wells can be mosquitoes