Sphaeroderma balyi Jacoby 1885

Sphaeroderma balyi Jacoby, 1885 Fig. 16 A – J Host plant. Asteraceae: Farfugium japonicum (L.), Parasenecio kamtschaticus (Maxim.), P. amagiensis (Kitam.), P. yatabei (Matsum. et Koidz.), Petasites japonicus (Siebold et Zucc.). Leaf mine. Upper-layer linear mine on the mature leaf, with trajectories usually adjoining each other (Fig. 16 B, E, I, J). Frass is minute granular, deposited linearly along either side of the mine. The fully grown larva exits the mined leaf in autumn, falls to the ground, and pupates underground. Material examined. • 2 adults, Mt. Teine, Sapporo, Hokkaidô, 10-VII-1995 (as larva on Petasites japonicus), emerged on 10-VIII-1995; • 1 adult, Shimoike, Tsuruoka, Yamagata Pref., 12-VI-2019 (as larva on Petasites japonicus), emerged on 10-VII-2019; • 1 adult, Mt. Haguro, Tsuruoka, Yamagata Pref., 8-VII-2018 (as larva on Petasites japonicus), emerged on? - IV- 2019; 1 adult, Renge-onsen, Itoigawa, Niigata Pref., 1-VII-2013 (as larva on Petasites japonicus), emerged on 10-VIII-2013; • 4 adults, Ukawa, Kyôtango, Kyoto Pref., 17-IX-2019 (as larva on Petasites japonicus), emerged on 15–20-X-2019 (Fig. 16 A – C); • 1 adult, Nagawado, Matsumoto, Nagano Pref., 12-VII-2003 (as larva on Petasites japonicus), emerged on 1-IX-2003; • 2 adults, Tôbai, Nemuro, Hokkaidô, 23-VII-2018 (as larva on Parasenecio kamtschaticus), emerged on 30-VII – 4-VIII-2018 (Fig. 16 D, E); • 1 adult, Torikura-rindo, Ôshika, Nagano Pref., 30-VI-2013 (as larva on Parasenecio yatabei), emerged on 28-VIII-2013; • 1 adult, Yawatano, Izu, Shizuoka Pref., 12-V-2002 (as larva on Parasenecio amagiensis collected by T. Kato), emerged on 26-VI-2002; • 3 adults, Amatsu-kominato, Kamogawa, Chiba Pref., 14-V-2008 (as larva on Farfugium japonicum), emerged on 27-V-2008; 3 Dôgashima, Nishiizu, Shizuoka Pref., 9-V-2004 (as larva on Farfugium japonicum), emerged on 23-VI-2004; 3 Ena, Yura, Hidaka-gun, Wakayama Pref., 19-V-2002 (as larva on Farfugium japonicum), emerged on 12–15-VI-2002; • 2 adults, Ashizuri-misaki, Tosashimizu, Kochi Pref., 23-IV-2018 (as larva on Farfugium japonicum), emerged on 7-VI-2018; • 1 adult and manly leaf mines, Kobukei, Nichinan, Miyazaki Pref., 23-X-2022 on Farfugium japonicum (Fig. 16 F – J).