Studies on the Chironomid Midges of Tsushima and Iki Islands, Western Japan. : Part 2. Species of Orthocladiinae and Tanypodinae Collected on Tsushima.

Collection of the adult specimens of the insects family Chironomidae were carried out by Suzuki during the period from March 24 to 26, using light traps at 2 localities and by daytime sweeping with insect net at 18 localities on Tsushima Island. By microscopic examinations of 377 individually mounted slide specimens, 127 were found to be belonging to the subfamily Chironominae, and were classified into 48 species including 34 new species, and were described in our previous report (Sasa and Suzuki, 1999). The rest 250 specimens were classified into 56 species (including 31 new species) of the sub family Orthocladiinae, and 6 species (including 2 new species) of the sub family Tanypodinae. It was again demonstrated that this island is very rich in the chironomid fauna, and many new species are again added by the present studies. It is also shown that rather rare species so far collected only in central or eastern Japan are found in this remote island located in western Japan near the Asian continent