Abstract
Thirty spider species belonging to 12 families were recorded from cabbage fields in the preliminary survey made at Shimobaru in Fukuoka in May, 1975. Theridion octomaculatum B. et S. and Oedothorax insecticeps B. et S. were the most abundant throughout the 9 study plots. Diets of these two species were mainly composed of small-sized miscellaneous insects of Hemiptera and Diptera. Spiders of the cabbage fields were revealed to be similar to those of the paddy fields as to the spider-fauna and major species. Spatial distribution of T. octomaculatum was nearly uniform, suggesting that strong mutual interference was occurred among individuals.