抄録
Surveys on spider fauna have been carried out to know the seasonal change, breeding season, habitats and role as predators of pest insects in a cattle barn and surroundings in Saga Prefecture during a period from April to October in 1968. In total, spiders observed were 53 species belonging to 46 genera of 22 families among which seven species were dominant, namely Oecobius annulipes, Theridion tepidariorum, Neoscona nautica, Nephilia clavata, Agelena limbata, Pardosa T-insignata and Oxyopes sertatus. The maximum number of spider species was recorded in June; 47 species. The preys by web-spiders were shown to be mainly the species of Diptera. The total number of preys recorded were 283 Nematoceras, 411 Bracyceras and 306 of other insects. Especially, the preys of spiders were the species of Suborder Tipulidae, Chironomidae and Muscidae (Diptera). The species of the order Nematocera were trapped by the viscid lines of the webspider, Argiopidae, especially the genus Aranea, and the species of the order Brachycera were killed mostly by web-spiders and some by hunting spiders.
