Axinoscymnus nigripennis Kamiya, 1965

(Figs 12a–g)

Axinoscymnus nigripennis Kamiya, 1965: 100 .— Sasaji 1971: 115, Yang et Wu 1972: 125, Ren et Pang 1992: 21, Pang et al. 2004: 90.

Diagnosis. This species is similar to A. pingxiangicus Peng et Chen, sp. n. in external appearance and male genitalia but can be separated from the latter by the ventrite 1 with coarse punctures at middle (Fig. 12d), and the penis guide swollen at base in lateral view (Fig. 12f). It also resembles A. rai Kamiya in the shape of male genitalia but can be easily distinguished from the latter by the black elytra (Fig. 12a).

Description. TL: 1.38–1.69 mm, TW: 0.95–1.19 mm, TH: 0.66–0.87 mm, TL/TW: 1.42–1.46 EL/EW: 1.10– 1.11, PL/PW: 0.50–0.54, HW/PW: 0.64–0.73, PW/EW: 0.68–0.72.

Body oval, moderately convex, dorsum with pale yellow pubescence (Figs 12a–c). Head, antennae and mouthparts yellowish brown (Fig. 12c), tip of mandibles dark brown. Pronotum yellowish brown. Scutellar shield dark brown. Elytra black (Figs 12a, 12c). Prothoracic hypomeron and prosternum yellow. Mesoventrite and metaventrite black. Elytral epipleurae black or dark brown. Legs yellowish brown.

Head with fine frontal punctures, slightly larger than eye facets, 1.0–1.5 diameters apart. Eye densely faceted, interocular distance about 0.3 times of head width (Fig. 12c). Pronotal punctures slightly larger than those on frons, 1.0–1.5 diameters apart. Surface of elytra with punctures much larger than those on pronotum, separated by 1.0–2.0 diameters.

Abdominal postcoxal lines complete and moderately recurved, reaching 3/4 length of ventrite 1 (Fig. 12d), area enclosed by the lines finely and sparsely punctate, irregularly distributed, broadly smooth along the lines; ventrite 1 with strongly coarse and sparse punctures at middle.

Male genitalia. Penis slender, base of penis slightly broadened, narrowing to apex (Fig. 12e); tegmen with penis guide stout, swollen at basal half, then abruptly converging to pointed tip in lateral view (Fig. 12f), slightly longer than 2/3 length of parameres; in inner view, penis guide parallel sided from base to 3/4, then gradually tapering to pointed apex (Fig. 12g); parameres elongate oval with several setae at apex in lateral view (Fig. 12f).

Material examined. CHINA: Guangxi: 4♂ 5♀, Gaozhai, Maoershan Mountains, 20. X. 2004, Wang XM leg. 2♂ 4♀, Shili Great Canyon, Maoershan Mountains, 19. X. 2004, Wang XM leg. 1♀, Maoershan Mountains, 17. X. 2004, Wang XM leg. 1♂, Fulongshan Mountains, Shiwandashan Mountains, 8. XI. 2004, Zhang CW leg. 1♂, Hongqi Forestry Station, Shiwandashan Mountains, 9. XI. 2004, Lv XB leg. 1♂ 1♀, Hongqi Forestry Station, Shiwandashan Mountains, 10. XI. 2004, Zhang CW leg. 2♂ 2♀, Hongqi Forestry Station, Shiwandashan Mountains, 6–8. XI. 2004, Wang XM leg. 1♀, Hongqi Forestry Station, Shiwandashan Mountains, 26. VII. 2005, Ren SX leg. Guizhou: 1♂ 1♀, Dongtang, Maolan, Libo, ca 730 m, 15–18. X. 2008, Chen XS et al. leg . 3♀, Sancha River, Maolan, ca 750 m, 19. X. 2008, Chen XS et al. leg . 1♂, Wengang, Maolan, Libo, ca 750 m, 20–23. X. 2008, Chen XS et al. leg . Hunan: 1♀, Shennong Valley, Yanling, ca 1100 m, 7. X. 2010, Wang XM et al. leg . 2♂ 1♀, Shennong Valley, Yanling, ca 1000 m, 8. X. 2010, Wang XM et al. leg . 1♂ 1♀, Shennong Valley, Yanling, ca 650–800 m, 9. X. 2010, Wang XM et al. leg . Anhui: 3♂ 3♀, Guniujiang, Shitai, 24. IX. 2010, Wang XM et al. leg . Hainan: 1♂, Limushan Mountains, 22. VII. 2006, Wang XM leg. 1♂, Diaoluoshan Mountains, 7. V. 2005, Wang XM leg. Guangdong. 1♂ 1♀, Shimen, Shimentai N, 29. X. 2004, Wang XM leg. 2♂, Huangdong, Shimentai, 30. X. 2004, Wang XM leg. 1♂, Yangqiushan Mountains, Shimentai, 6. X. 2004, Wang XM leg. 3♂ 3♀, Wulangfeng, Shimentai, 8. X. 2004, Wang XM leg. 1♂ 1♀, Nankunshan Mountains, Huizhou, 21. X. 2004, Wang XM leg. Taiwan : 1♂ 1♀, Tongmen to tailuge, ca 200–912 m, 30. X. 2012, Chen XS et al. leg . 2♀, Zhiben, Taidong, ca 230 m, 28. X. 2012, Chen XS et al. leg . 1♀, Nanheng Highway, Chishang, Taidong, ca 679 m, 29. X. 2012, Chen XS et al. leg . 1♀, Jiaxian to Tengzhi, ca 370–1450 m, 25. X. 2012, Chen XS et al. leg. Hongkong : 1♂ 4♀, Country Parks, Shuitang, Chengmen, ca 206 m, 13. V. 2018, Wang XM leg. 1♀, Country Parks, Baxianling, ca 91 m, 13. V. 2018, Wang XM leg. LAOS: 1♂, Nam Phao, Bolikhamxai, ca 700 m, 26. V. 2007, Wang XM et al. leg .

Distribution. China (Guangxi, Guizhou, Hunan, Anhui, Hainan, Guangdong, Taiwan, Hognkong); Laos; Japan.

Remarks. This species is recorded from Laos for the first time.