Abstract
It was already reported that flies tend to emerge out from any animal fecal materials. In this investigation, the fly fauna at the inside and outside of dwelling houses was observed, using fly catch ribbons, from May 1962 to April 1963. The data was collected from eight farms keeping a few live-stocks and two non-farms in Hino-machi, Tokyo. The results were summarized as follows : Thirty-two families of flies consisting of Muscidae, Calliphoridae, Sarcophagidae and others, were observed during the period of observation. The total of the flies was 49, 176 individuals, of these Muscid flies were ranked first, amounting to 14, 446 individuals. The majority of the fly species showed the peak of the prevalence at early summer, from June to July. Only Musca domestica showed two peaks, viz., May and December. A considerable difference of fly number was observed depending on the collecting site. In general, inside the dwelling houses Musca domestica and Fannia canicularis were abandant, while outside the dwellings Stomoxys calcitrans, Sciarids, Milichiids, Scatopsids and the other small-sized flies were frequent. There was a wide difference of the number of flies collected inside each dwelling houses. A large number of flies were collected naturally in the farms keeping live-stock, as well as an ordinary non-farming house, if it was located adjacent to a live-stock barn or a manure shed.
