Key to the Dilophotes species known from Palaearctic Region and Indochina

1. Male antennae flabellate (Fig. 4), phallus relatively short, robust (Figs 22, 23) or considerably curved (Fig. 26) ............................................................................................. 2

­ Male antennae very slightly serrate to filiform (Fig. 5), phallus otherwise shaped ...... 6

2. Pronotum and elytra yellow, male eyes 1.36 times interocular distance, phallus considerably curved (Fig. 26) ............................................................................ D. luteus sp. n.

­ Pronotum and elytra concolourous black or at least pronotal margins and some parts of elytra red and both body parts at least partly covered with reddish pubescence, interocular distance 1.3­2.0 times maximum eyes diameter .................................................... 3

3. Whole body black or dark reddish brown and covered with dark pubescence ............. 4

­ At least some part of elytra and pronotum red and upper side of body at least partly covered with reddish pubescence.................................................................................. 5

4. Body black, phallus 3.3 times longer than wide in middle (Fig. 22) ............................. ...................................................................................................... D. anthracinus sp. n.

­ Body dark reddish brown, phallus 5 times longer than wide in middle ......................... ...................................................................................................... D. vandykei (Nakane)

5. Black, pronotum light brown at margins, pronotum and sometimes humeral part of elytra covered with red pubescence ............................................. D. ohirai (Ohbayashi)

­ At last margins of elytra and pronotum red, upper side of body covered with reddish pubescence, phallus as in fig. 23 .................................................. D. lizipingensis sp. n.

6. Maximum eye diameter 1.2 times interocular distance. Phallus distinctly widened in apical part (Fig. 25), pronotum and elytra orange to yellow, body small (5.0­6.0 mm) .............................................................................................................. D. kubani sp. n.

­ Interocular distance at least 1.1 times maximum eye diameter. Phallus slender, parallel­sided or very slightly widened. Pronotum black or dark red, seldom orange and then body large, 8.0­13.0 mm length, and phallus as in fig. 12 ................................... 7

7. Phallus very slender, straight, internal sac attached to phallus by two basal sticks and additionally formed by two apical sclerotized complex plates (Figs 9, 12, 13, 14, 15, D. atricollis group)........................................................................................................ 8

­ Phallus robust, considerably shorter (Fig. 17, 19) or curved in the apical third (Fig. 11, 16), internal sac otherwise shaped (Figs 17, 18, 20) .................................................. 16

8. Lower plate of internal sac small (Figs 14, 13)............................................................. 9

­ Lower plate of internal sac extensive (Figs 9, 12, 15) ............................................... 11

9. Upper plate of internal sac widely curved (Fig. 14).................................................... 10

­ Upper plate of internal sac straight basally (Fig. 13) ...................... D. holzschuhi sp. n.

10. Ventral margin of upper plate dentate (see Kasantsev, 2000, fig. 5)............................... ................................................................................................ D. qinlinganus Kasantsev

­ Ventral margin of upper plate simple (Fig. 14) ................................ D. laosensis sp. n.

11. External margin of lower plate of internal sac dentate .............................................. 12

­ External margin of lower plate of internal sac entire ................................................. 13

12. Body large, 8­13 mm length, orange yellow, upper part of external margin of lover plate of internals sac straight (Fig. 12)......................................... D. bhutanensis sp. n.

­ Body smaller, 6.0 mm length, external margin of lover plate of internals sac widely rounded. ................................................................................................. D. sausai sp. n.

13. Pronotum dark red with infuscate middle, elytra dark red, and sometimes slightly infuscate basally ................................................................................ D. particularis Pic

­ Pronotum concolour black or red ............................................................................... 14

14. Pronotum and elytra concolour, dark red to brownish black, and always covered with red pubescence ........................................................................................................... 15

­ Pronotum black, with very short inconspicuous brown pubescence, elytra brightly orange red ............................................................................................. D. atricollis Pic

15. Inner margin of lower plate widely emarginate (see Kasantsev, 2000, fig. 7)................ ................................................................................................ D. berezowskii Kasantsev

­ Inner margin of lower plate with sharp dent (see Kasantsev, 2000, fig. 3) .................... .................................................................................................... D. tibetanus Kasantsev

16. Each elytron with 2 costae in humeral part....................................... D. ilyai Kasantsev

­ Each elytron with 3 costae in humeral part ................................................................ 17

17. Internal sac extent beyond apex of phallus by at least a half of phallus length ........ 18

­ Internal sac extent at most very slightly beyond apex of phallus ............................... 20

18. Phallus slender, moderately curved apically, internal sac only slightly wider than phal­ lus. ...................................................................................... D. atrorufus (Kiesenwetter)

­ Phallus very stout, internal sac robust, distinctly wider than apical part of phallus .. 19

19. Apical ring approximately as long as wide (Fig. 20) ................... D. pacholatkoi sp. n.

­ Apical ring twice wider than long (Fig. 18) ................................... D. moxiensis sp. n.

20. Phallus three times longer than internal sac (Fig. 17) ......................... D. jendeki sp. n.

­ Phallus five times longer than internal sac (Fig. 16) ..................... D. bolavensis sp. n.