Abstract
The farm manure is one of the most important sources in which breed flies in ordinary farm houses. In order to know what species of flies are bred in animal feces, the major material of the manure, the seasonal occurrence of flies was observed at the National Institute of Animal Industry, Ministry of Agriculture and Forestry, Chiba City, during the period from June 1960 to May 1961. In this experiment, the fecal materials of cattle, horses, swine and goats were used. The flies were bred in a pot of 11cm in diameter and 12cm in depth filled with the fecal materials. All of the emerged Diptera from the fecal materials were classified into 11 families and 14 species as shown in Table 2. The fly species, which are important for the public health and emerge in a great number, were the four, such as Musca domestica vicina, Muscina stabulans, Fannia canicularis and Stomoxys calcitrans. The majority of Musca domestica vicina emerged out during the period from June to October. This species emerged out from every animal fecal material, and especially in a large number from the feces of swine followed by those of horses. Many of Stomoxys calcitrans emerged out from the fecal materials of cattle and goats. The emergence of flies increased in the case of the feces mixed with feeds than that of the feces alone. The tendency was especially remarkable in Musca domestica vicina.
