## 3 Results
Elytra with lateral margins slightly divergent posteriad, punctation very dense and fine (Figure 8A,B). Scutellum densely and finely punctate, pup  
Abdominal tergites III-VI each with punctation of median portion gradually becoming sparser apical. Male. Sternite VII slightly emarginate in middle of posterior margin; sternite VIII rounded emarginate in middle of posterior margin; 9 th sterile triangularly emarginate in middle of posterior margin; aedeagus (Figure 9A-D) symmetrical, median lobe elongated, inner sac with weakly sclerotized sclerites; paramere slender, distinctly shorter than median lobe, slightly curved ventral in lateral view, with few apical setae. Figure 8: **(A,B)** Adult habitus of _N. Inujiayaoi_ (holotype). **(C–L)** antennae of _Naddia_. **(C)**_N. miniata_; **(D)**_N. chinensis_; **(E)**_N. taixuanensis_; **(F)**_N. mangshanensis_; **(G)**_N. chenchangchini_; **(H)**_N. nanlingensis_; **(I)**_N. atripeus_; **(J)**_N. rufipennis_; **(K)**_N. monticola_; **(L)**_N. Inujiayaoi_. Scale bars: 2 mm **(A,B)**, 1 mm **(C–L)**. Figure 9: **(A–D)** Aedeagus of _Naddia hujiayaoi_. **(A,B)** ventral view; **(C,D)** lateral view. Scale bars = 0.5 mm. Female. Sternite VIII with posterior margin entire. **Distribution**. China (Zhejiang, Fujian, Jiangxi, Hunan, Guangxi, Guangdong). **Diagnosis**. The new species is similar to _N. monticola_ [PERSON], 1994 in general appearance, but it may be distinguished from the latter by continued elytral pupescence patch at middle of posterior margin (interrupted in _N. monticola_) and longer aedeagal paramere compared with median lobe (Figure 9A-D). **Etymology**. This species is named in honor of our dear colleague Dr. [PERSON], who is working on Staphyllinidae and collected some specimens of the new species. _Naddia hainanensis_**[PERSON], 2010**  
_Naddia hainanensis_ [PERSON], 2010, 7. **Material examined**. None. **Distribution**. China (Hainan). **Key to Chinese species of _Naddia_**  
1. Elytra with distinct bronze or coppery tint, elytral surface covered with reddish pupescence; segments of antennal club more cylindrical, last antennal segment elongate and symmetrical; species with large body size: BL = 16.4-23.6 mm..................2 -  
- Elytra without bronze or coppery tint, elytral surface without reddish pupescence (exception: _N. rufpennis_); segments of antennal club more flattened, last antennal segment mostly short and asymmetrical (exception: _N. hainanensis_); species with varied body size: BL = 13.3-20.0 mm..................6  
2. Full-winged species, posterior margin of abdominal tergite VII with distinct palisade fringe..................3 -  
- Bracbytterous species, posterior margin of abdominal tergite VII without or with indistinct palisade fringe..................5 -  
3. Aedeagal paramere with short setae..................4 -  
- Aedeagal paramere with long setae (Figure 2A-D)). China (Yunnan), Myanmar, Laos..................N. _miniata_  
4. Antennal segments 8-11 about as long as wide (Figure 8D). China (Beijing, Gansu, Zhejiang, Jiangsu, Guizhou, Sichuan, Henan, Hunan, Shaanxi, Fujian, Jiangxi, Chongqing, Guangxi, Hubei)..................N. _chinensis_  
- Antennal segments 8-11 shorter than wide (Figure 8E). China (Taiwan)..................N. _taiavanensis_  
5. First four visible tergites each with longitudinal golden pubescent patches laterally; aedeagal paramere sharply prominent with long apical setae. China (Guangxi)..................N. _chenchangchini_**sp. nov**. - First three visible tergites each with longitudinal golden pubescent patches laterally; aedeagal paramere roundly prominent with short subapical setae. China (Fujian, Guangdong, Hunan)..................N. _mangshanensis_  
6. Elytra reddish; pronoun with transverse patch of dense golden pubescent midlength. China (Yunnan), Myanmar..................N. _rufpennis_  
- Elytra blackish; pronoun without patch of distinct golden pubescence.........7  
7. Smaller species with BL = 11.7 mm, tibiae yellow.