Rhadinosa nigrocyanea (Motschulsky, 1860)

Fig. 19 I – P

Host plant.

Poaceae: Miscanthus condensatus Hack., M. sinensis, M. oligostachyus Stapf, M. tinctorius (Steud.), Pleioblastus chino var. viridis .

Leaf mine.

Upper-layer linear-blotch mine on mature leaf (Fig. 19 N – P). Frass is granular, deposited along larval trajectory in the mine. The fully grown larva pupates in the mine.

Material examined.

• 1 adult, Hatabe-gen’ya, Aso, Kumamoto Pref., 16-VII-2018 (as larva on Miscanthus sinensis), emerged on 21-VII-2018 (Fig. 19 I – O) ; • 1 adult, Fukube-dani, Hakusan, Ishikawa Pref., 1-X-2019 (as larva on M. tinctorius), emerged on 14-X-2019 (Fig. 19 P) ; • 2 adults, Mt. Kujû, Kokonoe, Kusu-gun, Ôita Pref., 27-IX-2019 (as larva on M. oligostachyus), emerged on 7–11-X-2019 ; • 1 adult, Mt. Yufu, Beppu, Ôita Pref., 23-VII-2017 (as larva on Pleioblastus chino var. viridis), emerged on 26-IX-2017 .