Key to males of Chinese Pselaphodes

1. Antennomeres VII modified, asymmetric, either expanded or with a mesal spine-like protuberance (Yin et al. 2011: 468, Fig. 21; Yin et al. 2010: 13, Fig. 97).......................................................................... 2

- Antennomere VII not modified, nearly symmetric, simple in form.............................................. 8

2 (1). Antennomere X not modified (Yin et al. 2011: 468, Fig. 21; Yin et al. 2010: 13, Figs. 97–98)......................... 3

- Antennomere X variously, strongly modified (Yin et al. 2010: 13, Figs. 90–92, 99)................................ 5

3 (2). Antennomere IX not modified (Yin et al. 2010: 13, Fig. 98) (Zhejiang)................ P. latilobus Yin, Li et Zhao, 2010

- Antennomere IX more or less expanded mesally (Yin et al. 2011: 468, Fig. 21; Yin et al. 2010: 13, Fig. 97).............. 4

4 (3). Larger, over 3.50 mm; antennomeres V–VI each much longer than wide, IX slightly expanded mesally (Yin et al. 2010: 13, Fig. 97) (Sichuan)........................................................... P. hlavaci Yin, Li et Zhao, 2010

- Smaller, below 3.00 mm; antennomeres V–VI each slightly longer than wide, IX strongly expanded mesally (Yin et al. 2011: 468, Fig. 21) (Sichuan)..................................................... P. meniscus Yin, Li et Zhao, 2011

5 (2). Antennomere IX with a disc-shaped process near anterior margin (Yin et al. 2010: 13, Fig. 91). (Guizhou)...................................................................................... P. miraculum Yin, Li et Zhao, 2010

- Antennomeres IX lacking disc-shaped process near anterior margin, (Yin et al. 2010: 13, Figs. 90, 92, 99).............. 6

6 (5). Scapus with a large lateral sensory area, antennomere X strongly concave at middle of mesal margins (Yin et al. 2010: 13, Fig. 99). (Zhejiang)........................................................... P. declinatus Yin, Li et Zhao, 2010

- Scapus lacking sensory area, antennomere X slightly or not concave (Yin et al. 2010: 13, Figs. 90, 92)................ 7

7 (6). Antennomere XI strongly modified, curved laterally and dramatically broadened towards apex (Yin et al. 2010: 13, Fig. 92); pronotum with anterolateral margins rounded (Yin et al. 2010: 4, Fig. 1). (Shaanxi, Henan).................................................................................................... P. nomurai Yin, Li et Zhao, 2010

- Antennomeres XI simple, nearly oval (Yin et al. 2010: 13, Fig. 90); pronotum with anterolateral margins strongly angulate (Yin et al. 2010: 4, Fig. 4). (Zhejiang, Jiangxi).......................................... P. walkeri (Sharp, 1892)

8 (1). Antennomeres IX with indistinct to conspicuously protuberant disc-shaped process nearanterior margin (Fig. 5; Yin et al. 2011: 468, Figs. 13, 15, 18, 20)......................................................................... 9

- Antennomeres IX lacking disc-shaped process near anterior margins (Yin et al. 2011: 468, Figs. 14, 16, 17, 19, 22, 23, 24)..................................................................................................... 18

9 (8). Antennomere X with a finely punctate ventral disc-shaped process (Yin et al. 2011: 468, Fig. 13).................... 10

- Antennomere X lacking ventral disc-shaped process (Yin et al. 2011: 468, Figs. 14–20, 22–24)...................... 11

10 (9). Antennal club well-defined (Yin et al. 2011: 468, Fig. 13); mesotibia with a tiny spine-like apical projection (Yin et al. 2011: 466, Fig. 1). (Xizang).................................................... P. biwenxuani Yin, Li et Zhao, 2011

- Antennal club indistinct (Yin et al. 2010: 13, Figs. 95–96); mesotibiae lacking apical projection (Yin et al. 2010: 11, Fig. 63; 12, Fig. 65). (Anhui, Zhejiang, Jiangxi, Fujian, Guizhou, Sichuan, Guangxi, Hianan).. P. tianmuensis Yin, Li et Zhao, 2010

11 (9). Apical part of metatibiae modified (Yin et al. 2011: 467, Fig. 8; Yin et al. 2010: 11, Fig. 59; 12, Fig. 70).............. 12

- Metatibiae simple................................................................................... 14

12 (11).Protibia with median or apical projection; metatibia with strongly protuberant apical modification (Yin et al. 2010: 6, Fig. 11; 11, Fig. 58)........................................................................................ 13

- Protibia lacking projection; metatibia with slightly protuberant apical modification (Yin et al. 2011: 467, Fig. 8). (Yunnan)......................................................................... P. jizushanus Yin, Li et Zhao, 2011

13 (12).Body black (Yin et al. 2010: 4, Fig. 3); antennomeres X much wider than long (Yin et al. 2010: 13, Fig. 93); procoxa with a posterior denticle; protibia with a small apical process (Yin et al. 2010:11, Fig. 58). (Qinghai)..................................................................................................... P. torus Yin, Li et Zhao, 2010

- Body reddish brown; antennomere X much longer than wide (Yin et al. 2010: 13, Fig. 100); procoxa lacking denticle; protibia with median process (Yin et al. 2010: 6, Fig. 11). (Anhui, Yunnan, Hainan).............. P. aculeus Yin, Li et Zhao, 2010

14 (11).Antennal club as in Fig. 5 or Yin et al. 2011: 468, Fig. 18; metacoxae protuberant (Fig. 65)......................... 15

- Antennal club as in Yin et al. 2011: 468, Fig. 15 or Yin et al. 2010: 13, Figs. 94, 101; metacoxa not protuberant (Yin et al. 2010: 12, Fig. 77)................................................................................... 16

15 (14).Elytra with two pairs of discal humps (Yin et al. 2011: 466, Fig. 6). (Yunnan)..... P. gongshanensis Yin, Li et Zhao, 2011

- Elytra lacking discal humps (Fig. 2). (Guangxi)............................................... P. hui new species

16 (14).Mesofemur simple (Yin et al. 2011: 472, Fig. 68; Yin et al. 2010: 12, Fig. 76)................................... 17

- Mesofemur with a tiny submedian spine (Yin et al. 2010: 11, Fig. 61). (Henan).......... P. cornutus Yin, Li et Zhao, 2010

17 (16).Antennae and legs conspicuously long (Yin et al. 2010: 6, Fig. 12); protrochanters simple (Yin et al. 2010: 12, Fig. 70). (Yunnan)................................................................. P. subtilissimus Yin, Li et Zhao, 2010

- Antennae and legs elongate (Yin et al. 2011: 466, Fig. 3); protrochanter with a distinct spine (Yin et al. 2011: 471, Fig. 51). (Guizhou, Guangxi)........................................................ P. condylus Yin, Li et Zhao, 2010

18 (8). Head with genae angularly expanded laterally (Fig. 1); antennomere XI strongly modified (Fig. 4). (Guangxi)............................................................................................ P. dayaoensis new species

- Head with genae rounded laterally; antennomere XI simple (Fig. 6; Yin et al. 2011: 468, Figs. 14, 16–17, 19, 22–24; Hlaváč et al. 2000: 150, Fig. 1 -A)............................................................................... 19

19 (18).Antennomeres IX–X (Yin et al. 2011: 468, Figs. 14, 16) strongly modified....................................... 20

- Antennomeres IX–X simple (Yin et al. 2011: 468, Figs. 17, 19, 22, 23, 24; Hlaváč et al. 2000: 152, Fig. 2 -A; Fig. 6)...... 21

20 (19).Antennal club as in Yin et al. 2011: 498, Fig. 14; anterolateral margins of pronotum roundly angulate (Fig. 26); mesofemora covered with long setae (Yin et al. 2011: 472, Fig. 67); metacoxae spinose (Yin et al. 2011: 472, Fig. 64); aedeagus as in Yin et al. 2011: 474, Fig. 93–94. (Xizang)........................................... P. bomiensis Yin, Li et Zhao, 2011

- Antennal club as in Yin et al. 2011: 498, Fig. 16; anterolateral margins of pronotum not angulate (Yin et al. 2011: 469, Fig. 28); mesofemora lacking long setae (Yin et al. 2011: 472, Fig. 69); metacoxae simple; aedeagus as in Yin et al. 2011: 474, Figs. 97– 98. (Xizang).............................................................. P. cuonaus Yin, Li et Zhao, 2011

21 (19).Protibiae modified in apical halves (Yin et al. 2011: 471, Figs. 62–63)........................................... 22

- Protibiae simple...................................................................................... 23

22 (21).Antennomere IX much shorter than XI (Yin et al. 2011: 468, Fig. 17); metaventral processes long (Yin et al. 2011: 470, Fig. 41); protibia slightly protuberant mesally near the apices (Yin et al. 2011: 471, Fig. 62). (Zhejiang)............................................................................................. P. fengtingae Yin, Li et Zhao, 2011

- Antennomere IX about as long as XI (Yin et al. 2011: 468, Fig. 23); metaventral processes short (Yin et al. 2011: 470, Fig. 47); protibia with a small median spine-like process and a well-defined mesoapical protuberance (Yin et al. 2011: 471, Fig. 63).

(Hainan)................................................................ P. pectinatus Yin, Li et Zhao, 2011 23 (21).Prochanter simple (Yin et al. 2011: 471, Fig. 60; Hlaváč et al. 2000: 152)........................................ 24

- Prochanter with a distinct spine (Yin et al. 2011: 471, Figs. 55, 58; Fig. 18)...................................... 25

24 (23).Legs simple without spines (Yin et al. 2011: 468, Fig. 12; 472, Figs. 60, 77); aedeagus as in Yin et al. 2011: 475, Figs. 109– 110. (Guizhou)............................................................. P. yanbini Yin, Li et Zhao, 2011

- Legs with profemora and mesotrochanters each with a spine (Hlaváč et al. 2000: 152); aedeagus as in Hlaváč et al. 2000: 152, Fig. 2, B–C. (Yunnan).......................................... P. yunnanicus (Hlavá ĕ, Nomura et Zhou, 2000)

25 (23).Larger, over 3.0 mm; antennae and legs extremely long (Yin, Li et Zhao, 2011: 467, Fig. 7); profemur without spine, covered with conspicuously long setae (Yin, Li et Zhao, 2011: 471, Fig. 55); mesotrochanter with a distinct spine (Yin, Li et Zhao, 2011: 472, Fig. 72); aedeagus as in Yin, Li et Zhao, 2011: 475, Figs. 103–104). (Xizang).................................................................................................... P. hanmiensis Yin, Li et Zhao, 2011

- Smaller, below 2.8 mm; antennae and legs long (Fig. 3; Yin, Li et Zhao, 2011: 467, Fig. 10); profemur covered with short setae and with a large median spine (Fig. 18; Yin, Li et Zhao, 2011: 471, Fig. 58); mesotrochanter with multiple spines (Fig. 21; Yin, Li et Zhao, 2011: 472, Fig. 75).......................................................................... 26

26 (25).Mesotrochante with three spines (Yin, Li et Zhao, 2011: 472, Fig. 75); aedeagus with apex of median lobe not forked (Yin, Li et Zhao, 2011: 475, Fig. 107–108). (Guizhou)..................................... P. parvus Yin, Li et Zhao, 2011

- Mesotrochanter with two spines (Fig. 21); aedeagus with apex of median lobe forked (Fig. 27). (Guangxi)............................................................................................ P. maoershanus new species