Collections of the drosophilid flies were done in 16 localities in San-in region from the spring of 1957 to the present time. A total of 28255 specimens was obtained. They were devided into 50 species belonging to 10 genera.
Twenty-eight species of Amiota alboguttata f. furcata, Leucophenga ornatipennis, L. argentosa, L. magnipalpis, L. maculata, L. concilia, L. angusta, Microdrosophila-like sp., Mycodrosophila splendida, M. poecilogastra, Dettopsomyia argentifrons, Scaptomyza graminum, Drosophila alboralis, D. quadrivittata, D. histrioides, D. sexvittata, D. coracina, D. nipponica, D. angularis, D. nigromaculata, D. testacea, D. sternopleuralis, D. histrio, D. grandis, D. curviceps, D. pengi, D. sordidula and D. daruma were added as new member of the drosophilid fauna to the former report in the Chugoku destrict.
Some remarks were given to a certain species.