Eupolyphaga sinensis (Walker, 1868)

Figs 4 K, L, 5 F, N

Polyphaga sinensis Walker, 1868: 14.

Homoeogamia sinensis: Saussure 1869: 282; Hollier et al. 2020: 347. Synonymized by Qiu et al. 2018.

Heterogamia sinensis: Dohrn 1888: 132.

Heterogamia dohrniana Saussure, 1893: 309; Hollier et al. 2020: 345.

Polyphaga limbata Kirby, 1903: 379.

Eupolyphaga sinensis: Chopard 1929: 262; Qiu et al. 2018: 5 (revision); Qiu et al. 2019: 11 (checklist); Han et al. 2022: 84.

Material examined.

• 2 females; Beijing City, Haidian District, Beijing Xishan National Forest Park; 28 Apr. 2015; Bing–Qiang Wang leg • 1 female; Anhui Prov. Hefei City, Binhu County; 3 Oct. 2018; Lin Zhou leg • 1 female; Jiangsu Prov., Nanjing City, Xuanwu District, Zijin Mountain, Zhongshan Mausoleum; 18 Jul. 2021; Ya-Ning Sun, Yi-Fan Zhao leg.

Description on the female characters.

Supra-anal plate (TX) dark yellowish brown and densely covered with setae, the posterior margin protruded medially. Paraprocts (pp.) pubescent, curved hook-like extensions thin and long. The two median sclerites irregularly-shaped. Cerci short, not exceeding the posterior margin of supra-anal plate. Paratergites (pt.) long and banded. Crosspiece (cp.) nearly transparent, the protrusion robust. Posterior lobes of valvifer II (p. l.) weakly sclerotized. Spermathecal plate (sp. pl.) broad, distinctly concave in the middle, two lobes foliated. Spermatheca (sp.) consists of four distinct, large ampullas. The terminal ampulla abnormally enlarged, with a bifurcated catheter attached to one side of the ampulla. Basivalvula (bsv.) transverse, with two long and narrow lobes, the lateral margin curly. Vestibular sclerite (vst. s) shaped like the letter “ W ”. The three protrusions almost identical in height. Terminal of both sides’ protrusion expanded. Subgenital plate (SVII) densely setose, posterior margin protruded and the terminal part emarginated medially.