Eumetriochroa miyatai 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

Eumetriochroa miyatai Kumata, 1998

Fig. 18 .

Eumetriochroa miyatai Kumata, 1998: 89 –92, figs 2(B), 3, 12(C, D), 14(B), 22(B), 24(C–E); Sato & Kumata 2011, 573. Type locality: Japan (Fukuoka).

Pupa. ( Fig. 18 ). Sato and Kumata (2011; fig. III-4) described the pupal morphology of this species. In the present study, the pupa was found to be yellow, about 4.0 mm in length, 0.5–0.6 mm in diameter. Additional description: Clypeus with a pair of setae, divided at 2/3, another one about 1/6 shorter divided at apex ( Fig. 18 B, E).

Host plant. Ilex crenata Thunb. , I. pedunculosa Miq. and I. rotunda Thunb. in Japan, Aquifoliaceae ( Sato & Kumata 2011) .

Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu) ( Kumata 1998).

Specimens examined. 20 exs (2 3).

Adults: [Host: I. pedunculosa ]: 3 exs, Kōchi –bashi, Shorenji, Nabari, Mie, 6–7.vii.2010 em., S. Kobayashi, 4.vii.2010 (pupa); 2 exs, Kaimondake, Kagoshima, 26.xi. & 12.xii.1955, H. Kuroko. [Host: I. crenata ]: 2 exs, Shijonawate, Osaka, 2.vi.1975., H. Kuroko; [Hikosan, Fukuoka, H. Kuroko leg.]: 1 ex, 22.vii.1954.; 2 exs, 17.iv. & 8.vi.1955; 4 exs, Amami–Ohshima, Kagoshima, 22–25.x.2010 em., S. Kobayashi & T. Fujisawa, Host: Ilex crenata , 5.x.2010 (ex larva) in OPU. [Host: I. rotunda, S. Kobayashi leg.]: 1 3 3 exs, Adachi Park, Kokura, Fukuoka, 8.iii.2012 em., 20.ii.2012 (ex larva); 1 3 1 ex, Mikata, Mitsushima, Tsushima Is., Nagasaki, 4& 9.iv.2012 em., 27.iii.2012 (ex larva) in OPU.

Pupae: 3 exs.

[Nabari, Mie Pref., S. Kobayashi leg.]: 1 ex, Nishi–rokuban–cho, Yuri–gaoka, 25.iii.2010., Host: I. crenata , 14.iii.2010 (ex larva); 2 exs, Kōchi –bashi, Shorenji, 14.ii.2011, Host: I. pedunculosa , 5.ii.2010 (ex larva).

Biology. Kumata (1998), Sato and Kumata (2011) detailed the biology of this species. In the present study, we newly recorded the length and/or width of mines, larvae, and cocoon folds. We observed the larvae on the above three hostplants forming serpentine mines on the adaxial epidermis; whitish to ocherous, 20~ cm in length, ~0.7–4.0 mm in width; frass line: ocherous to blackish, ~0.5–1.0 mm in width; usually 1–2 mines per leaf. The mines on Ilex crenata often covered all of the adaxial epidermis of the leaf. The late instar larva is 5.4–6.0 mm long and yellow in coloration. A pupal cocoon fold (white to brown, 7.0 mm in length, 1.3–2.6 mm in width) is situated at the end of the mine, and usually along leaf margins.

Figures

FIGURE 18. Pupa of Eumetriochroa miyatai Kumata, 1998. A. Head, ventral view. B. Cocoon cutter, ventral view. C. Frons. D. Head, lateral view. E. Cocoon cutter, lateral view. F. Spines on 5 th abdominal tergum, lateral view. G. Head, dorsal view. H. Cocoon cutter, dorsal view. I. A 7 – A 10, ventral view. J. lateral view. K. Dorsal view. L. Dorsal process of cremaster, lateral view. ds: dorsal seta; ls: lateral seta.