Eumetriochroa hiranoi Kumata, 1998

Kobayashi, Shigeki, Huang, Guo-Hua, Nakamura, Akihiro & Hirowatari, Toshiya, 2013, Four new species of Gracillariidae (Lepidoptera) from China and Japan, and description of the pupal morphology of the genera Corythoxestis, Eumetriochroa, Guttigera, and Metriochroa, Zootaxa 3619 (2), pp. 101-129 : 119-120

Eumetriochroa hiranoi Kumata, 1998

Fig. 19 .

Eumetriochroa hiranoi Kumata, 1998: 96 –99, figs 5(C), 12(G, H), 14(E), 25(C, D). Type locality: Japan (Okinawa).

Pupa. ( Fig. 19 ). Ochreous to brown, 2.3–2.7 mm in length, 0.3–0.4 mm in diameter. Vertex with a triangular frontal process ( Fig. 19 B, E, F). Clypeus with a pair of long setae, about twice length of frontal process ( Fig. 19 A, B, D). Dorsum of A2–A8 with a concentration of small spines in anterior portion ( Fig. 19 G, H). Plate-like A10 furcated with a pair of short processes from caudal apex, with small acute processes at apex ( Fig. 19 I–L). another pair of short acute caudal ones laterally ( Fig. 19 I, K).

Host plant. Styrax japonicus Siebold & Zucc. in Japan, Styraceae ( Kumata 1998).

Distribution. Japan (Honshu, Kagoshima (Amami Is.) and Okinawa Prefectures) ( Kumata 1998).

Specimens examined. 16 exs.

Adults: Host: Styrax japonicus ]: 1 ex, Konagao, Soni, Uda, Nara, 18–26.x.2009 em., S. Kobayashi, 26.ix.2009 (ex larva); [Hikosan, Fukuoka, H. Kuroko leg.]: 4 exs, 28.vi.1954.; 2 ex, Same locality, 18.iv. & 24.iv.1955., H. Kuroko; 4 exs, Nagakumo–toge, Amami–Ohshima, Kagoshima, 18–19.x.2010 em., S. Kobayashi & T. Fujisawa, 5.x.2010 (ex larva); 3 exs, Takeda, Ishigaki Is., Okinawa, 25, 28, 31.iii.2011., S. Kobayashi, 16–17.iii.2011 (ex larva).

Pupae: 6exs.

[Host: Styrax japonicus ]: 2 exs, Amami–Ohshima, Kagoshima, 23.x.2010 em., S. Kobayashi & T. Fujisawa, 4.x.2010 (ex larva); 2 exs, Takeda, Ishigaki Is., Okinawa, 25.iii.2011., S. Kobayashi, 17.iii.2011 (ex larva), 2 exs, Mt. Sumitsuka, Konagao, Soni, Nara, 20–21.vii.2011., S. Kobayashi, 17.vii. 2011 in OPU.

Biology. Kumata (1998) reported the biology of this species. In the present study, we newly recorded the length and/or width of mines and larvae. We observed the larvae on Styrax japonicus forming long linear, irregularly curved mines on the adaxial epidermis; whitish, 15~ cm in length, 2.0~ mm in width; frass line: pale yellow to brown, ~1.0–2.0 mm in width; usually one mine per leaf. The late instar larva is 3.0–5.0 mm long and yellow in coloration.

Figures

FIGURE 19. Pupa of Eumetriochroa hiranoi Kumata, 1998. A. Head, ventral view. B. Cocoon cutter and pair of setae of clypeus, ventral view. C. Frons. D. Head, lateral view. E. Cocoon cutter, lateral view. F. Head, dorsal view. G. Spines on 6 th abdominal tergum. H. lateral view. I. A 8 – A 10, ventral view. J. lateral view. K. Dorsal view. L. Acute process of cremaster. ds: dorsal seta; ls: lateral seta.