Abstract
A survey of the habitats of Aedes albopictus and Ae. riversi was carried out in selected locations in the southwestern part of Japan during the summer seasons of 1975 and 1976. It was observed that Ae. albopictus attacked human bait predominantly in open areas near densely populated regions while Ae. riversi preferred mostly at sparsely populated forested areas for feeding. The larvae of both species were found equally in both artifical breeding containers such as discarded cans and natural breeding containers such as tree holes, bamboo stumps. Therefore, differences of the habitat of each species seemed to be due to their flight places whether in open areas or in forested areas.
