An investigation on the problem of overwintering of the house-flies in towns andfarms of Chengtu was carried out during November 1959 to May 1960. The physio-logical state of the female adult flies was observed.

• 1959年11月至1960年5月在成都市郊的集镇和农村作了家蝇越冬问题的探研。 着重解剖雌蝇观察成蝇的生理状态,作为判断生殖系统是否执行任务、繁殖的强度和是否冬蛰的标准。