Key to the Domene species of mainland China

1 Male sternites V and VI with shallow and small postero-median impression.................... D. emeiana Assing, 2015

- Male sternites V and VI without postero-median impression....................................................2

2 Coloration of elytra brownish red.................................................. D. procera Eppelsheim, 1886

- Coloration of elytra much darker (usually brown or black).....................................................3

3 Male sternite VII without distinctly modified setae...........................................................4

- Male sternite VII with modified setae..................................................................... 11

4 Male sternite VIII (Fig. 5E) with very deep posterior excision, nearly one third as deep as length of sternite........................................................................................... D. jini Peng & Li, new species

- Male sternite VIII with small posterior excision..............................................................5

5 Male sternite VIII with pronounced oblong median impression, on either side of posterior excision without modified setae...................................................................................... D. exicta Assing, 2016

- Male sternite VIII with shallow postero-median impression, on either side of posterior excision with modified black setae.. 6

6 Legs with distinctly bicoloured metafemora................................ D. immarginata Assing & Feldmann, 2014

- Legs with nearly completely blackish-brown metafemora......................................................7

7 Length of antenna no more than 3.4 mm. Elytra nearly as long as pronotum (EL/PL 0.93–0.94)................................................................................................... D. jiangi Peng & Li, new species

- Length of antenna more than 3.6 mm. Elytra distinctly shorter than pronotum (EL/PL ± 0.86)..........................8

8 Median lobe of aedeagus longer (AL 1.29 mm; Figs 6F, G) and with strongly sclerotized apical portion of dorsal plate............................................................................ D. nanlingensis Peng & Li, new species

- Median lobe of aedeagus shorter (AL 1.07–1.20 mm) and with moderately sclerotized apical portion of dorsal plate....... 9

9 Ventral process of median lobe of aedeagus spear-head shaped in ventral view................... D. contiger Assing, 2016

- Median lobe of aedeagus with very slender ventral process....................................................10

10 Coloration of antennomeres IV–XI paler. Head approximately as broad as long or weakly transverse. Posterior margin of female sternite VIII truncate in the middle............................................ D. affimbriata Assing, 2015

- Coloration of antennomeres IV–XI darker. Head weakly oblong. Posterior margin of female sternite VIII broadly convex...................................................................................... D. hei Peng & Li, 2015

11 Median lobe of aedeagus with completely reduced dorsal plate. Posterior margin of female sternite VIII with distinct median concavity............................................................ D. firmicornis Assing & Feldmann, 2014

- Median lobe of aedeagus with distinct dorsal plate. Female sternite VIII with more or less convex posterior margin....... 1 2

12 Head with fine punctation. Male sternite VIII with shallow postero-median impression, on either side of the shallower poste- rior excision without cluster of setae......................................................................13

- Head with moderately coarse punctation. Male sternite VIII with oblong postero-median impression, on either side of the deeper posterior excision with a dense cluster of black setae...................................................15

13 Legs with yellowish brown metafemora. Antenna shorter (AnL 2.55–2.65 mm). Elytra with coarse macropunctation and shal- low micropunctation. Female genital segments with relatively small sclerotized structure............ D. chenpengi Li, 1990

- Legs with more or less bicoloured metafemora. Antenna longer (AnL 2.78–3.62 mm). Elytra with very fine punctation. Female genital segments with more pronounced structure........................................................... 14

14 Punctation of head and pronotum coarser. Male sternite VII with numerous moderately modified dark setae; ventral process of aedeagus with slender apical portion in lateral view...................................... D. chenae Peng & Li, 2014

- Punctation of head and pronotum less coarse. Male sternite VII with numerous distinctly modified black setae; ventral process

of aedeagus with stout apical portion in lateral view......................................... D. reitteri Koch, 1939 15 Smaller species (FL 4.70–5.20 mm). Aedeagus smaller (AL 1.07–1.18 mm)................ D. malaisei Scheerpeltz, 1965

- Larger species (FL 5.12–6.00 mm). Aedeagus larger (AL> 1.30 mm)...........................................16

16 Legs with distinctly bicoloured meso- and metafemora (basal half yellowish, apical half blackish).....................17

- Legs with brownish or blackish meso- and metafemora.......................................................18

17 Antenna shorter (AnL 3.35 mm; Figs 1G, H). Head somewhat broader than pronotum. Male sternite VIII (Fig. 1F) with Vshaped posterior excision.................................................... D. aqiang Peng & Li, new species

- Antenna longer (AnL 3.6–3.9 mm). Head approximately as broad as pronotum. Male sternite VIII with U-shaped posterior excision........................................................................ D. praefigens Assing, 2015

18 Coloration of body (Fig. 4C) blackish brown. Head weakly transverse (HL/HW 0.92; Fig. 7A). Male sternite VIII (Fig. 7E) with extensive median impression................................................. D. tui Peng & Li, new species

- Coloration of body dark brown. Head oblong (HL/HW 1.04–1.14). Male sternite VIII with pronounced oblong median impression...............................................................................................19

19 Median lobe of aedeagus with longer, more slender ventral process. Female genital segments with small symmetric, weakly sclerotized structure....................................................... D. reducta Feldmann and Peng, 2014

- Median lobe of aedeagus with shorter, less slender ventral process. Female genital segments with asymmetric, moderately sclerotized structure......................................................................................20

20 Punctation of elytra coarser and with more rugose interstices, surface nearly matt. Male sternite VII with broadly concave posterior margin; male sternite VIII with shallower impression; ventral process of aedeagus with less slender and less acute apical portion. Female genital segments with smaller sclerotized structures................. D. cultrata Feldmann and Peng, 2014

- Punctation of elytra less coarse and with less rugose interstices, surface slightly more shiny. Posterior margin of male sternite VII concave in the middle; male sternite VIII with deeper impression; ventral process of aedeagus with more slender and more acute apical portion. Female genital segments with larger sclerotized structure....... D. cuspidata Feldmann and Peng, 2014