新乡市自来水公司第四水厂位于该市南郊，日供水能力达12万f。去年夏季在该厂斜管沉淀池水面上集结了大量的摇蚊，在密度较高的水面上，每平方米达2500余只。摇蚊是在水中生长的后生动物，极喜欢在静水水面上栖息。夏季是摇蚊大量产卵繁殖的季节，将卵子产于水中，卵包的粘絮状 Xinxiang City Waterworks Fourth Waterworks located in the southern suburbs of the city, daily water supply capacity of 120,000 f. Last summer, a large number of chironomid mosquitoes were assembled on the water surface of the sedimentation tank in the inclined pipe of the factory, reaching more than 2,500 pieces per square meter on the water with higher density. Chironomus is a metazoan that grows in the water and likes to inhabit the still water. Summer is a large number of choppers oviparous breeding season, the eggs produced in the water, the eggs floc sticky floc