Taxonomic Notes and New Distribution and Host Plant Records for Sawflies and Woodwasps (Hymenoptera, Symphyta) of Japan VI Author Fu, Yuanzun Author Yuan, Yuan Author Shen, Qian Author Xu, Hao Author Ye, Zheng Author Guo, Li Author Wu, Xiaoliang Author Zhao, Yunhe text Bulletin of the National Museum of Nature and Science. Series A, Zoology 2021 2021-11-22 47 4 163 188 http://dx.doi.org/10.1039/d4cp01914h journal article 10.50826/bnmnszool.47.4_163 2434-091X 12760197 Corymbas nipponica Takeuchi, 1936 Japanese name: Huto-koshijiro-habachi ( Fig. 2N–P ) Material examined . HONSHU: Tochigi Pref. : 1 ˂, Nakagawa , Wami , 33°46′N 140°10′E , coll. larva ( Fig. 2N ), on Sanguisorba officinalis , 12. VI. 2016 , mat. 29. VI . ( Fig. 2P ), em. 26. IV. 2017 , S. Ibuki . Larva . Middle instar ( Fig. 2N ): head creamy white; trunk pale, covered with snow-white woolly wax. Late instar ( Fig. 2O ): head dark yellow; trunk pale greenish, covered with snow-white woolly wax; thoracic legs dark yellow. Mature larva ( Fig. 2P ): head dark yellow; trunk pale green, without wax covering. Host plants. Rosaceae : Rubus spp. ( Okutani, 1967b ), Geum japonicum Thunb. ( Okutani, 1967b ), Sanguisorba officinalis L. (new record). Life history . This is a univoltine species with the adult emergence in April to May and the larval feeding stages in May to June in lowlands of central Honshu. The larva is a solitary external feeder of the host leaves ( Fig. 2N–O ). On maturity, the reared larva had an extra molt ( Fig. 2P ) and went into the soil. Remarks . This is the first record of Sanguisorba officinalis as the host plant of C. nipponica . For a detailed description of the larva, see Okutani (1959) .