Halticorcus sauteri

Halticorcus sauteri (S. - H. Chen, 1934) Fig. 8 I – O Host plant. Dryopteridaceae: Cyrtomium falcatum (L. f.); Oleandraceae: Nephrolepis cordifolia (L.); Polypodiaceae: Colysis elliptica (Thunb.), Loxogramme salicifolia (Makino), Leptochilus neopothifolius Nakaike, Lemmaphyllum microphyllum Presl., Microsorum buergerianum (Miq.), Phymatosorus scolopendria (Burm. f.). Thelypteris acuminata (Houtt.) is also reported as adult’s host plants by Suzuki et al. (2008). Leaf mine. Upper-layer linear-blotch mine on mature leaf (Fig. 8 J – L, N, O). Frass is thread-like, thin, and often intermittent, and deposited along the meandering larval trajectory. The fully grown larva exits the mined leaf, falls to the ground, and pupates underground. Material examined. • 1 adult and several leaf mines, Imasato, Uken, Amami-ôshima Is. Kagoshima Pref., 4-IX-2011 on Cyrtomium falcatum (Fig. 8 K, L); • 2 adults, Angyaba, Tatsugô, Amami-ôshima Is. Kagoshima Pref., 8-V-1997 (as larva on Cyrtomium falcatum), emerged on 22-VI-1997; • 22 adults, Kinsakubaru, Naze, Amami-ôshima Is. Kagoshima Pref., 3-VI-1996 (as larva on Nephrolepis cordifolia), emerged on 2-VII-1996; • 1 adult, Naon, Yamato, Amami-ôshima Is. Kagoshima Pref., 11-V-2002 (as larva on Colysis elliptica), emerged on 11-VI-2002; • 10 adults, Segiri, Nagata, Yaku Is., Kumage-gun, Kagoshima Pref., 27-V-1990 (as larva on Leptochilus neopothifolius), emerged on? - VII- 1990; • 3 adults, Higashinamaka, Amami-ôshima Is. Kagoshima Pref., 20-V-2015 (as larva on Leptochilus neopothifolius), emerged on 17–18-VI-2015 (Fig. 8 I – J); • 2 adults, Mt. Yuwan, Uken, Amami-ôshima Is., Kagoshima Pref., 30-VI-1992 (as larva on Microsorum buergerianum), emerged on 25-VII-1992; • 1 adult and several leaf mines, Tonaki Is., Shimajiri-gun, Okinawa Pref., 18-III-2020 (as larva on on Phymatosorus scolopendria), emerged on 20-V-2020 (Fig. 8 M – O).