Stenaesthetus SHARP

Key to the Oriental species of the genus Stenaesthetus SHARP View in CoL

(FL = furrow length, S = sternite, ST = spermatheca)

1 Pronotum simple, without longitudinal furrows or lateral rugae (figs 1, 2)........................2

- Pronotum otherwise; with longitudinal furrows and/or lateral rugae (figs 3-9)..................5

2 Elytra longer (EW: EL =1.09-1.30), shoulders simple, abdominal sculpture scabrous.......3

- Elytra shorter ( EW: EL =131-140, Ø 1.35; fig. 1). Shoulders with a short carina, abdomen punctate.: S 8 (as in fig. 26). E (fig. 57). 2.2-2.8mm.: ST (fig. 101). (FB 1.2-1.3mm). India ( Meghalaya) ........................................................... St. scabratus View in CoL nov.sp .

3 Elytra longer (EW: EL =1.09-1.26)....................................................................................4

- Elytra less long (EW: EL =1.22-1.21, Ø 1.27): S 8 (fig. 26). E (fig. 56). 2.2-2.8mm (FB 1.2-1.3mm). India ( Assam, W. Bengal, Arunachal Pradesh) ............. St. scaber View in CoL nov.sp.

4 Larger: 2.7-3.3mm (FB 1.5-1.6mm), head narrower (HW: EW Ø 0.80).: Excision of S 8 longer than half the length of S (fig. 35). S 9 (fig. 30). E (fig. 58).: ST (fig. 100). China ( Yunnan), Thailand.................................................................. St. conflictatus PUTHZ View in CoL

- Smaller: 1.9-2.5mm (FB 1.1-1.2mm), head broader (HW: EW Ø 0.85).: Excision of S 8 less long than half the length of S (fig. 34). S 9 with some dorsal setae. E (fig. 55).: ST (fig. 102). Japan, China ( Sichuan, Yunnan, Taiwan, Shanghai, Guangxi, Beijing), Vietnam, Thailand, Nepal, India, Pakistan, Sri Lanka, Indonesia ( Sulawesi)........ ............................................................................................................... St.sunioides SHARP View in CoL

5 Pronotum with a short, very narrow lateral carina..............................................................6

- Pronotum with a long lateral furrow...................................................................................8

6 Punctation of pronotum slightly rugose, mostly distinctly delimited. Larger species.........7

- Sculpture of pronotum rugose longitudinally, punctures in long and dense rugae. Smaller: 1.8-2.1mm (FB 0.8-1.0mm).: S 8 (fig. 47). E (fig. 59). Vietnam....................... ................................................................................................................. St. perroti View in CoL nov.sp.

7: S 7 (fig. 23), S 8 (fig. 37). E (fig. 33).: ST (fig. 93). 1.9-2.6mm (FB 1.0-1.2mm). Thailand, Vietnam, China ( Sichuan, Yunnan, Guizhou, Guangxi, Hongkong)..................... ..................................................................................................... St. deharvengi OROUSSET View in CoL

-: S 7 (fig. 24), S 8 (fig. 41). E (fig. 29).: ST (as in fig. 93). 1.8-2.2mm (FB 0.9- 1.0mm). Thailand.................................................................................... St. odiosus View in CoL nov.sp.

8 Pronotum, shiny, impunctate or shallowly punctate............................................................9

- Pronotum matt or slightly shiny, densely punctate/sculptured..........................................10

9 Smaller, frons reticulate, labrum pointed.: S 8 (fig. 46), E (fig. 60).: Unknown. 1.8mm (FB (0.8mm). Myanmar................................................................... St. naso View in CoL nov.sp.

- Larger, frons punctate, interstices smooth, labrum simple.: S 8 (fig. 39). E (fig. 61).: ST (fig. 92). 2.0-2.4mm (FB 1.1-1.2mm). India ( Assam)............. St. nitidicollis View in CoL nov.sp.

10 Frons and clypeus uniformly sculptured...........................................................................16

- Frons and clypeus differently sculptured, clypeus ± set off from frons............................11

11 Smaller, FB <0.8mm.: S 8 (fig. 42). E (fig. 63). 1.7-1.9mm (FB 0.8mm). Malaysia........ ........................................................................................................ St. frontalis (CAMERON) View in CoL

- Larger, FB 1.0mm...........................................................................................................12

12 Distance between longitudinal furrows of pronotal disc from anterior margin of pronotum less than length of antennal segment 3..............................................................13

- Distance between longitudinal furrows of pronotal disc from anterior margin of pronotum wider, at least as wide as length of antennal segment 3....................................15

13: E (figs 26-28). 2.3-2.8mm (FB 1.0-1.2mm). Nepal, India ( Sikkim, W. Bengal) ............. ............................................................................. St. canaliculatus canaliculatus COIFFAIT View in CoL

-: E (fig. 32). 2.4-2.9mm (FB 1.2mm). Nepal................. St. canaliculatus taurulus PUTHZ View in CoL

14 Frons moderately shiny, densely sculptured with shallow longitudinal rugae (fig. 3). Larger: 2.6-3.0mm (FB 1.3-1.6mm).: E (fig. 65).: ST (fig. 96). China ( Yunnan) ........ ............................................................................................................ St. hastipenis View in CoL nov.sp.

- Frons shiny, nearly smooth. Smaller.................................................................................15

15: S 8 (fig. 51). E (fig. 66).: ST (fig. 91). 2.1-2.7mm (FB 1.1-1.2mm). Nepal................ ............................................................................................................. St. nitidifrons PUTHZ View in CoL

-: E (fig. 62). 1.9-2.4mm (FB 1.0-1.1mm). India (Darjeeling distr.) ................................... ....................................................................................................... St. angulatipenis View in CoL nov.sp.

16 Longitudinal furrows of pronotal disc shorter, less long than half the length of .............the pronotum (e. g. figs 8, 9)...................................................................................................36

- Longitudinal furrows of pronotal disc longer than half the length of the pronotum (e. g. figs 3-7)....................................................................................................................17

17 Longitudinal furrows of pronotal disc broader, as broad as antennal segment 2...............18

- Longitudinal furrows of pronotal disc less broad, narrower than antennal segment 2......20

18 Pronotum deply and densely striate longitudinally, labrum simple.: S (fig. 49). E (fig. 67). 1,8mm (FB 0.8mm). Thailand........................................... St. rimosicollis View in CoL nov.sp.

- Pronotum deeply and densely punctate (fig. 7), labrum with two tiny median calli. 19

19: S 8 (fig. 45). E (fig. 88). 1.5-1.9mm (FB 0.8mm). Malaysia......... St. malayanus PUTHZ View in CoL

-: S 8 (as in fig. 45). E (fig. 68). 1.5-1.9mm (FB 0.8mm). Malaysia....... St. persimilis View in CoL nov.sp.

20 Longitudinal furrows of pronotal disc longer, distance from anterior margin of pronotum distinctly less than one eye-length....................................................................21

- Longitudinal furrows of pronotal disc about as long as one eye-length or longer.............25

21 Elytra less broad (EW: EL <1.40). Paraglossae prominent, spine-shaped (fig. 13)..........22

- Elytra broader (EW: EL>1.40). Paraglossae not prominent, not spine-shaped (figs 10- 12) .....................................................................................................................................23

22 Elytra deeply and densely punctate.: S 8 (fig. 52). E (fig. 69). 2.3mm (FB 1.2mm). China ( Yunnan).................................................................................... St. schuelkei View in CoL nov.sp.

- Elytra less deeply, moderately densely punctate.: S 8 (fig. 43). E (fig. 73). 2.5mm (FB 1.3mm). China ( Yunnan) ............................................... St. gaoligongmontium View in CoL nov.sp.

23 Furrows of pronotal disc nearly attaining anterior margin of pronotum. Sculpture of pronotum densely reticulate, no distinct punctation.: E (fig. 70).: ST (fig. 102). 1.0-2.0mm (FB 1.0mm). Nepal............................................................. St. smetanai View in CoL nov.sp.

- Furrows of pronotal disc distinctly separate from anterior margin of pronotum. Anterior pronotum distinctly punctate..............................................................................24

24: S 8 (fig. 44). E (figs 74, 75). Punctation of pronotum less deep. 1.9-2.2mm (FB 1.0- 1.1mm). India ( West Bengal) .................................................................. St. hastifer View in CoL nov.sp.

-: E: (fig. 76). 1.9- 2,3mm (FB 1.0-1.1mm). India (W. Bengal)....... St. indicus (CAMERON) View in CoL

25 Frons impunctate...............................................................................................................26

- Frons ± distinctly punctate................................................................................................29

26 Pronotum impunctate........................................................................................................27

- Pronotum on anterior half ± distinctly punctate, punctures elongated longitudinally.: E (fig. 71). 2.0-2.5mm (FB 1.0mm) .................................................... St. nepalensis PUTHZ View in CoL

27: E (fig. 72). 2.0-2.4mm (FB 1.0-1.1mm). Nepal................................ St. martensi PUTHZ View in CoL

-: otherwise......................................................................................................................28

28: E (fig. 64). 2.3-2.8mm (FB 1.0-1.2mm). Nepal, India ( Sikkim, W. Bengal) ................... ................................................................................................ St. quadrisulcatus CAMERON View in CoL

-: S 8 (fig. 48). E (fig. 77). 2.0-2.3mm (FB 1.1mm). China ( Yunnan) .......... St. puetzi View in CoL nov.sp.

29 Pronotum coarsely and densely punctate, punctures distinctly delimited, as large as apical cross section of antennal segment 2, interstices smooth, shiny.: E (fig. 83). 2.0-2.4mm (FB 1.1mm). Laos.............................................................. St. kurbatovi View in CoL nov.sp.

- Sculpture of pronotum otherwise (punctures less large/elongate longitudinally/interstices reticulate)..................................................................................30

30 Species from Taiwan.........................................................................................................31

- Species from the Asian mainland......................................................................................33

31: E (fig. 78).: ST (fig. 11, PUTHZ 1995) y). 2.0-2.2mm (FB 1.0mm). China ( Taiwan).................................................................................................. St. nomurai PUTHZ View in CoL

-, otherwise.................................................................................................................32

32: Sides of posterior impression of S 6 slightly prolonged posteriad, posterior margin broadly emarginate, posterior margin of S 7 slightly emarginate medially. E (fig. 80).: ST (fig. 95). 2.0-2.6mm (FB 1.1mm) China ( Taiwan)................. St. formosanus View in CoL nov.sp.

-: Sides of S 6 not prolonged posteriad, posterior margin broadly emarginate, posterior margin of S 7 simple. E (fig. 79). 2.0-2.3mm (FB 1.0-1.1mm). China ( Taiwan)............................................................................................. St. taiwanensis PUTHZ View in CoL

33 Posterior middle of pronotum between medial disc furrows deeply and densely sculptured.: S 8 (as in fig. 54).: ST (about as in fig. 94). 1.9-2.4mm (FB 1.0- 1.1mm). Thailand.......................................................................................... St. thai View in CoL nov.sp.

- Posterior middle of pronotum between medial disc furrows less deeply and less densely sculptured than anterior mddle of pronotum........................................................34

34 Lateral portion of pronotum beside lateral longitudinal furrow narrowly not smooth but finely sculptured/punctate.................................................................................................35

- Lateral portion of pronotum beside lateral longitudinal furrow completely impunctate/smooth: see # 27 ..................................................... St. quadrisulcatus COIFFAIT View in CoL

35: S 8 (fig. 40). E (fig. 86).: ST (fig 20). 1.8-2.5mm (FB 1.1mm). Thailand................... ................................................................................................................... St. loebli View in CoL nov.sp.

-: S 8 (fig. 53). E (fig. 84).: ST (about as in fig. 94). 1.9-2.3mm (FB 1.0-1.1mm). Thailand............................................................................................... St. siamensis View in CoL nov.sp.

36 Punctures of pronotum deeper, elongated longitudinally but not in long shallow rugae.: S 8 (fig. 50). E (fig. 87).: ST (fig. 98). 1.9-2.4mm (FB 1.0-1.1mm) China ( Fujian, Jiangxi, Zhejiang) ............................................................. St. brevisulcatus View in CoL nov.sp.

- Punctures of pronotum less deep, arranged in long shallow longitudinal furrows............37

37 Longitudinal furrows of the pronotal disc shorter (PL: FL =52: 21/ 47: 21).: E (fig. 82).: ST (fig. 89). Japan (Iriomote Is., Ishigaki Is.)........................... St. insulanus PUTHZ View in CoL

- Longitudinal furrows of the pronotal disc longer..............................................................38

38 Head narrower than elytra (HW: EW <0,95). PL: FL =49: 29/ 51: 31).: E (fig. 81).: ST (fig. 90). 2.0-2.4mm (FB 1.0-1.1mm) Japan (Ie Rindo, Kuweijima Is., Amami-Oshima Is., Amami Is.) ................................................................... St. okinawaensis PUTHZ View in CoL

- Head as broad as elytra (HW: EW = 1.0). PL: FL =51: 28).: Unknown.: ST (fig. 99). 2.0mm (FB 1.05mm). Japan (Amami Oshima Isl.).......................... St. lackneri PUTHZ View in CoL