抄録
A series of surveys have been carried out on the spider species as natural enemies of pest insects in a garden of Sakurababa-machi, Nagasaki city over a period from 1955 to 1959,and from 1963 to 1966. A total of 87 species (61 genera and 26 families) including 40 common species were recorded in the garden through the observation years. The number of spider species was found abundantly from May through August particularly. The predominant species were the spiders belong the families of Argiopidae, Salticidae and Theridiidae. Most of the spiders were distributed in the bush and on the outer walls of the house but few on the ground. The insect species which destroyed by the spiders were also recorded; the preys confirmed were insects belong to the orders of Collenbola, Odonata, Blattaria, Orthoptera, Dermaptera, Isoptera, Hemiptera, Mecoptera, Lepidoptera, Coleoptera, Hymenoptera and Diptera. Especially great numbers of houseflies and chironomids (Diptera) were captured by almost all the spider species in the garden. The chironomids were trapped by the viscid lines of webs.
