Studies on the Chironomid Midges of Tsushima and Iki Islands, Western Japan : Part 1. Species of Chironominae Collected on Tsushima

Collections of adult chironomid midges using light traps in night time and by sweeping with insect net in daytime were carried out by Suzuki during 3 days period from 24 to 26 March, 1998, on Tsushima Island, located on the channel between the Korean Peninsula and Kyushu, Japan. The specimens were preserved in 70% alcohol, screened under stereomicroscope in the laboratory, and a part of them were dissected and mounted individually on slides in gum-chloral medium. A total of 512 adult male specimens were examined this time and 253 among them were identified as belonging to the subfamily Chironomidae, and the rest 259 were those belonging to other subfamilies. The former group was further studied in details, and identified as belonging to 48 spepcies, among which 13 are the species already recorded from Japan, one species, Micropsectra junci (Meigen, 1818) is a new record to Japan, and the rest 34 are recorded in this paper as new species