Abstract
To cralify the formation of the structure of forest stands created by ‘ecological tree planting’ techniqe in artificial islands and its potential for habitats of insects, the conditions of the stands and the insect fauna were investigated in an artificial island (on the fifteenth year after planting) and neighboring areas at Gobo city. In the island, the numbers of species and individuals of ground beetles such as silphid and carabid beetles were few, however, a large number of cicadas, particularly Cryptotympana facialis, were inhabiting in the island. The adult cicadas abounded in the stands showing well developed vegetation layers, and the upper layer were mainly composed of Machilus thunbergii and Elaecocarpus sylvestris. But most of the cicadas seemed to oviposit and/or moult into adults in the stands without such upper layer. In general, stands composed of Quercus phillyraeoides and Rhaphiolepis indica were utilized as oviposition and/or emergence place.
