Eupolyphaga xuorum sp. nov.

(Figs. 9 F–G; 14 M–O; 26 A–D; 39 J–K)

Type material. Holotype: CHINA: Sichuan: male (SWU), Caoke Township [草科乡], Shimian County [石棉县], Ya’an City [雅安市], 25.VIII.2016, Hao Xu and Jian-Yue Qiu leg. Paratypes: 10 males (SWU, 2 in 100% alcohol), same locality data as the holotype, 24, 25, 27.VIII.2016, Hao Xu and Jian-Yue Qiu leg.

Diagnosis. This species resembles E. hengduana, but can be distinguished from the latter by the following features: 1) Male pronotum generally unicolored (Fig. 14 M), while pronotum whitish marginated anteriorly in E. hengduana (Fig. 14 P); 2) male tegmina with large, clear, isolated maculae, outer basal margins distinctly brownish (Fig. 9 F), while maculae dense, mixed, minute in E. hengduana (Fig. 9 C); 3) male with abdomen totally black, smooth (Fig. 9 G), while abdomen brownish, darker toward apex in E. hengduana (Fig. 9 D); 4) genital hook curved sharply and rectangularly (Fig. 26 C), while genital hook roundly bended in E. hengduana (Fig. 28 C).

Description. Male. General: measurements (mm): body length: 19.0–21.7, overall length: 30.3–32.3, pronotum length×width: 5.1–5.6×8.9–9.3, tegmen length: 26.3–28.4. Size slender; brownish black, with dark brown maculae on tegmina (Fig. 9 F–G). Head: slightly elongate, brownish black. Interocular space narrow; ocelli large, ocelli ridge shallow, straight. Frons flat, with a few long pubescence. Antennae dark brown. Clypeus flat; ante-clypeus brown, occupies the lateral and hind margins of the clypeus; post-clypeus dark brown. Labrum wide, brown, pubescent, lateral corners of distal part round. Maxillary palpi and labial palpi brown (Fig. 14 N–O). Pronotum: covered with small dark brown pubescence, lateral fore borders with additional long brown setae. Unicolored brown, with anterior margin very narrowly light colored. Cephalic margin convex and truncated, lateral fore borders roundly oblique, lateral margins parallel, hind margin softly arched (Fig. 14 M). Tegmina and wings: extended the end of abdomen about 9.3–12.4 mm. Tegmina yellowish, hyaline, evenly with irregular and unequalsized dark brown speckles; the outer margins dark brown. Wings hyaline, with pale brown speckles in distal inner edge. Legs: black, with blackish pubescent, trochanter slightly yellowish; tibial spines dark brown. Abdomen: black and smooth. Supra-anal plate pubescent, transverse, median protruded, apex emarginated; two median sclerites broad; cerci long (Fig. 26 A). Subgenital plate black, slightly asymmetrical, median concave; styli black, slender (Fig. 26 B). Genitalia: well sclerotized. Left phallomere: L1 with anterior part strong protruded, left with a process, two hind lobes wide apart; L2 curved roundly, right end elongate; L3 straight, the hook curved sharply and rectangularly; pda small, paa weakly protruded; L8 small. Right phallomere: large; R1M stout, hind portion robust, transparent; R1L thin; R3 thick, gradually narrower toward the connecting part of R3 and R2; R2 with two large and irregular chunks, the outer one round, the inner one slightly quadrate, with four slightly protruded corners (Fig. 26 C–D).

Female. Unknown.

Nymph. Black, median of body with whitish spots (Fig. 39 K).

Ootheca. Unknown.

Variation. The brownish outer margins of the tegmina may only reach half of the tegmen length from the base, but some individuals may be expanded, which could reach about 2/3 length of the tegmen.

Etymology. This species is named in honour of the couple Mr. Hao Xu and Ms. Jian-Yue Qiu, who are working on Chinese Cetoniinae beetles. During their collecting trips in China, they have collected many Eupolyphaga roaches and kindly donated them to us for study.

Natural History. Most of the type specimens were trapped by light during the end of August in Shimian, Ya’an. Two nymphs were found in the same area, which were collected from the root of the cliff beside the road (Fig. 39 J–K).

Distribution. China (Sichuan) (Fig. 2).