(48) Nemophora trimetrella Stringer, 1930

(Plates V-4, XI-4, XVI-4)

Nemophora trimetrella Stringer, 1930: 421 . (Type locality: Japan, Yokohama; BMNH); Hirowatari 2001: 193, figs. 1–8 (immature stages); Hirowatari 2013: 107, figs. 3-08-13,14,15; Umetsu 2014: 6, fig. 12 (Japan, Akita Prefecture); Fukuda & Kanai 2016 (Japan, Mt. Kirishima).

Diagnosis. The typical distinguishing character of this species is three yellow striae placed at the forewing base, 1/3 and 2/3 of the forewing length, respectively; the basal stria is curved and exceeding with the costal margin, and the other two transverse bands are slightly curved. In the male genitalia, the valva has a distinctly narrow apex, and the ventral margin is obviously expanding to form a lobar process.

Specimens examined. [ Yunnan] 1♂, Malipo County, Wenshan Zhuang and Miao Autonomous Prefecture, 2016.VI.26, G.H. Huang leg. (HUNAU); Syntype in BMNH.

Distribution. China (new record: Yunnan); Japan.

Remarks. This species occurs from May to July. Hirowatari (2001) reported the morphology and biology of immature stages and provided colored figures and immature illustrations. It is recorded here for the first time in China.

One DNA barcode of N. trimetrella (SaY712) from Japan is generated and the closest sequence is N. assamensis (pairwise distance: 0.037).