Matsumuraeses falcana (Walsingham, 1900)

(Figs. 3, 4, 11, 17)

Eucelis falcana Walsingham, 1900: 407.

Eucosma metacritica Meyrick, 1922: 515.

Matsumuraeses falcana (Walsingham): Razowski, 1960: 385.

Diagnosis. The species is characterized by having the cucullus subquadrate, straight on the outer margin, and slightly concave at the middle of ventral margin. It is superficially similar to M. phaseoli and M. medogensis, but it can be separated from them by the forewing having a long apex, the socii having densely long hairs, and the neck of the valva being about 2/5 the length of the cucullus.

Forewing length 7.0–10.0 mm.

Male genitalia (Fig. 11): Tegumen long, broad. Socii developed, with dense long hairs. Valva with neck about 2/5 width of apical margin of cucullus; cucullus subquadrate, slightly concave ventromedially, with distinct basal angle ventrally.

Female genitalia (Fig. 17): Papilla analis slender and long, with hairs. Anterior apophyses about equal to length of lamella postvaginalis. Lamella postvaginalis with distal half conspicuously widened and parallelsided, deeply concave at middle on posterior margin, forming two broad, apically rounded processes; two signa, blade-shaped, different in size.

Material examined. 1 ɗ, Xianfeng County, Hubei Province, 1280 m, 21.vii.1999, H. Li; 2 ΨΨ, Yangling, Shaanxi Province, 27–29.V.1985, H. Li; 1 Ψ, Baoxing County, Sichuan Province, 1600 m, 3.viii.2004, Y. Ren; 1 Ψ, Jianyang City, Sichuan Province, 350 m, 4.v.1994, J. Zhou; 10 ɗɗ, 7 ΨΨ, Mabian County, Sichuan Province, 900 m, 21.vii.2004, Y. Ren; 1 ɗ, Kunming City, Yunnan Province, 1900 m, 29.viii.2005, Y. Ren.

Host plants. Fabaceae: Robinia pseudoacacia L., Trifolium pratense L., Glycine max (L.) Merr., Pueraria lobata Ohwi (Razowski & Yasuda, 1975; Oku, et al., 1983; Komai, 1999; Liu & Li, 2002).

Distribution. China (Hubei, Shaanxi, Sichuan, Taiwan, Xizang (Tibet), Yunnan), Japan, Thailand, Nepal.