SIALIDAE (MEGALOPTERA) OF JAPAN

Two genera including eight species of Sialidae (Megaloptera) are recognized from Japan (Nipponosialis jezoensis (Okamoto), N. kumejimae (Okamoto), comb. n., Sialis sibirica McLachlan, S. yamatoensis sp. n., S. longidens Klingstedt, S. japonica Weele, S. melania Nakahara, and S. sinensis Banks). Nipponosialis, which has been considered to be a synonym of Sialis, is reinstated as a distinct genus. N. jezoensis includes two subspecies, jezoensis and kuwayamai ssp. n., and S. melania includes four subspecies, melania, tohokuensis ssp. n., toyamaensis ssp. n. and kyushuensis ssp. n. Both N. amamiensis Kuwayama and S. formosana Esben-Petersen are newly synonymized with N. kumejimae. S. frequens Okamoto has been synonymized with S. sibirica. S. nakaharai Kuwayama is newly synonymized with S. melania. Three species of Sialis (S. mitsuhashii Okamoto, S. diminuta Nakahara and S. iyoensis Kuwayama) are newly synonymized with S. japonica. S. nikkoensis Nakahara has also been synonymized with S. japonica.