Corythoxestis yaeyamensis Kumata 1998

Corythoxestis yaeyamensis (Kumata, 1998)

Figs. 2 L, 20.

Cryphiomystis yaeyamensis Kumata, 1998: 109 –110, figs 11, 13(G, H), 15(D), 27(C, D). Type locality: Japan (Okinawa).

Pupa. (Fig. 13 J, 20). Creamy yellow to darker yellow, 2.7 mm in length, 0.5 mm in diameter. Vertex with a triangular, laciniate, small frontal process (cocoon cutter) flanked by a pair of spatulate processes with a hair on inner apex (Fig. 20 B, E). Dorsum of A2–A10 with a pair of thick setae, and with a concentration of small spines in patches; A3–A9 with two pairs of long, lateral setae (Fig. 20 F, H, I). A10 with a pair of flat, digitiform, slightly curved processes projecting from lateral side (Fig. 20 J, M); another pair of laterally curved, uncinate processes from dorsal side of lateral ones (Fig. 20 O); a pair of short setae, as long as dorsal process from anterodorsal side of lateral ones (Fig. 20 L, O).

Distribution. Japan (Okinawa (Iriomote Is. (Kumata 1998), Ishigaki Is.).

Host plant. Saurauia tristyla DC. in Japan, Actinidiaceae (Kumata 1998).

Specimens examined. 7exs.

Adults: Japan: 7 exs, Maesato, Ishigaki Is., Okinawa, 13–17.v.2012 em., S. Kobayashi, K. Nakatsuka, T. Yoshida & T. Hirowatari leg. Host: Saurauia tristyla, 8.v.2012 (pupa & larva).

Pupae: 5 exs, Maesato, Ishigaki Is., Okinawa, 19.v.2012., S. Kobayashi, K. Nakatsuka, T. Yoshida & T. Hirowatari, 8, 11.v.2012 (pupa) in OPU.

Biology. Kumata (1998) recorded the biology of this species. In the present study, we newly recorded the length and/or width of the mine, larva, and cocoon fold. We observed the larvae on Saurauia tristyla forming a long serpentine mine on the adaxial epidermis; about 70~ cm in length, 0.3–1.2~ mm in width. The mines (Fig. 13 A–E) are usually found at a density of 1–6 mines per leaf. The larva is 2.7–6.0 mm long and yellow in coloration (Fig. 13 G). The final instar larva is 3.3~ mm long and yellow in coloration (Fig. 13 H). A pupal cocoon fold (whitish and blackish in the middle, 6.5–7.0 mm in length, 1.2–2.0 mm in width) is situated at the end of the mine (Fig. 13 I).