Periacma acriuncata Wang, Li & Liu, 2001

(Figs 1, 33)

Periacma acriuncta Wang, Li & Liu, 2001: 272. TL: China (Sichuan). TD: NKU.

Material examined. CHINA, Sichuan: Holotype ♂, Mt. Qingcheng (30º58′N, 103º31′E), 11.VII.1980, slide No. W 98370.

Additional material. Hunan: 1♂ 1♀, Xiangshanjiang, Mt. Shunhuang, Xinning County, 921 m, 7.VIII.2020, leg. H Sun et al., slide Nos. XZX20716♂, XZX20717 ♀; Sichuan: 2♂, Mt. Qingcheng, Dujiangyan, 860 m, 9‒ 10.VII.2021, leg. S Yu et al.,slide No. XZX20494, XZX20528.

Description. Adult (Fig. 1). Female wingspan 21.5 mm. Labial palpus yellow, second segment with blackish grey scales on outer surface, third segment with black scales on ventral surface. Other characters same as in male.

Female genitalia (Fig. 33). Papilla anale bell-shaped, with long setae. Apophysis posterioris about twice as long as apophysis anterioris. Eighth sternal plate concave at middle on posterior margin, forming two setose posterior lobes. Lamella antevaginalis greatly widened, produced into narrow triangular process extending obliquely backward posterolaterally. Antrum short, narrower than ductus bursae. Ductus bursae slightly longer than antrum, wrinkled, weakly sclerotized posteriorly. Corpus bursae ovoid; signum being a small, sub-circular plate bearing two large spines and several teeth.

Distribution. China (Hubei, Hunan, Sichuan).

Note. The female of this species is here described for the first time.