Studies on the ecology of blackflies (Diptera: Simuliidae) 39. Fauna of the blackflies in Kagoshima Prefecture in spring

摘要

The fauna and distribution of blackflies in Kagoshima Prefecture were studied based on the collections of larvae and pupae from streams and adults flying around the collectors at 73 sites in spring of 1997. A total of 15,650 blackflies, 14,114 larvae(90.2 percent in total number), 1,519 pupae (9.7 percent) and 17 adults (0.1 percent), were collected at 68 sites. All these blackflies were classified into 16 species of the genus Simulium Latreille. One species, Simulium (Simulium) suzukii was newly recorded from Kagoshima Prefecture. The most abundant species was S. (Gnus) bidentatum (51.3 percent in total number), followed by S. (S.) arakawae (21.2 percent) and S. (S.) japonicum (10.2 percent). The most widely distributed species was S. (Gn.) bidentatum (54 sites), followed by S. (S.) arakawae ( 46 sites), S. (Nevermannia) uchidai (32 sites), S. (S.) japonicum (19 sites) and S. (S.) quinquestriatum (19 sites).