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 Aglaostigma albicinctum (Takeuchi, 1953) Japanese name: Urashimasou-habachi ( Fig. 2A–F ) Material examined . HONSHU: Tochigi Pref. : 1ˁ, Wami, 36°45′N 140°09′E , Nakagawa, coll. larva, on Arisaema serratum , 10. VI. 2014 , mat. 13. VI., em. 6. IV. 2015 , S. Ibuki; 1˂, same locality, coll. larva ( Fig. 2C ), on Actinidia polygama , 22. VI. 2016 , mat. 26. VI ., em. 26. IV. 2017 , S. Ibuki ; 1 ˂, same locality, coll. larva ( Fig. 2B, D, F ), on Impatiens textorii , 28. V. 2016 , mat. 10. VI ., em. 24. IV. 2017 , S. Ibuki ; 1 ˁ , same locality, coll. larva ( Fig. 2A ), on Symplocarpus renifolius , 31. V. 2018 , mat. 13. VI ., em. 21. IV. 2019 , S. Ibuki . Larva . Early or middle instar ( Fig. 2A–B ): head pale grayish brown ( Fig. 2A , probably earlier instar) or gray ( Fig. 2B , probably later instar); trunk and legs creamy white. Late instar ( Fig. 2C–E ): head blackish; trunk and legs creamy white, most of dorsal region brown with paired whitish lines dorsally, and supraspiracular, epi- pleural and hypopleural regions of each segment and two or three terminal segments blackish. Mature larva ( Fig. 2F ): entirely vivid pale green. Host plants. Actinidiaceae : Actinidia polygama (Siebold et Zucc.) Planch. ex Maxim. (new record). Araceae : Arisaema spp. ( Okutani, 1967b ), Symplocarpus renifolius Schott ex Tzvelev. (new record). Balsaminaceae : Impatiens textorii Miq. (new record). Life history . This species has one generation a year. In lower mountains in central Honshu, the adults emerge in late April to May and the larval feeding stages are in May to June. The larva is solitary and has an extra molt on maturity before entering the soil. Remarks. Okutani (1967b) recorded Arisaema spp. ( Araceae ) as hosts of Aglaostigma albicinctum and here we newly recognize three species of three different plant families as hosts of this sawfly based on rearing. This is a polyphagous species. See Okutani and Takeuchi (1953) and Okutani (1959) for a detailed description of the larva and life history.