Abstract
The fly fauna was surveyed in the four farms of Tokyo keeping a large number of swine in May and September 1963. Flies were collected using fly catch ribbons in the same manner as the explained in former report. The observations were summarized as follows : 1) The total of collected flies amounted to 48, 254 individuals and they consist of Musca domestica, Fannia canicularis, Muscina stabulans, Stomoxys calcitrans, Calliphoridae spp., Sarcophagidae spp., and the other small-sized flies including of Drosophilidae, Psychodidae, etc. Among them, small-sized flies were ranked first, amounting to 36, 463 individuals (75.5% in total), followed by Musca domestica of 5, 686 individuals (11.8%), Fannia canicularis of 3, 813 individuals (7.9%), Muscina stabulans of 977 individuals (2.0%) and others. 2) As described in the former report, Musca domestica, Fannia canicularis and Muscina stabulans were widely observed on the inside of dwelling houses; on the other hand, Stomoxys calcitrans and small-sized flies predominated outside of the dwellings. Musca domestica were also collected considerably on the outside of dwellings, whenever the favorite diets for adult Musca domestica were available. In the case of Japanese style farm houses (opening planned houses), the number of flies in the dwellings tended to increase than that of flies in the closing planned houses. 3) It is highly likely that the number of flies in the farm in which they heap up or throw away the swine excreta and their feeds around the dwellings are numerously than that of the farm to good raising of swine. Through these observations, it was deemed that the number of flies in the such farm would be sharply decreased, if the several improvements of technical know-how for swine raising and sanitary consideration in the farm were completely practised.
