Key to the species of the Agrilus plasoni species group

1 Pronotal sides distinctly arcuate (Figs. 7­13); pronotal disk feebly convex transversally.................................................................. 2

­ Pronotal sides almost sublineal (Figs. 14­16); pronotal disk strongly convex transversally........................................................... 8

2 Elytra in adsutural apical third with oval, mazarine spot (PDV) (Figs. 7­8)...... 3

­ Elytra concolor (PDV) (Figs. 9­13)..................................... 4

3 Body robust, uniformly golden­green; elytral apices with outer marginal spine rather obtuse and feebly protruding; basal half of pronotal disk densely pubescent (ADV); aedeagus (Fig. 1).............................. A. chujoi Kurosawa (Fig. 7)

­ Body slender, bicolor; pronotum golden­orange, golden­yellow, elytra golden­green or golden­blue; elytral apices with outer, marginal spine sharply protruding; basal half of pronotal disk only with adsutural strip and indication of two humeral strips of narrow pubescence (ADV); aedeagus (Fig. 2)..... A. huashanus sp. nov. (Fig. 8)

4 Elytral apices separately, medially, acuminate.... A. hasegawai Kurosawa (Fig. 9)

­ Elytral apices with outer, marginal, sharp cusp or spina (Figs. 10­13)........... 5

5 Body dorsally black, silky lustrous; elytra with O­like ornament of whitish pubescence in apical third; aedeagus (Fig. 3)............. A. diaolin sp. nov. (Fig. 10)

­ Body dorsally brightly bicolor; pronotum from carmine to golden­orange, elytra golden­bluish­green; elytra with two adsutural spots of whitish toment in apical third (Figs. 11­13)................................................... 6

6 Prebasal, pronotal part uniplanar; elytral apices with whitish toment; aedeagus (Fig. 4)............................................ A. somnon sp. nov. (Fig. 11)

­ Lateral, prebasal, pronotal parts distinctly elevated; elytral apices glabrous...... 7

7 Spine on outer margin of elytral apices with long, attenuate tip; aedeagus (Fig. 5).................................... A. plasoni plasoni Obenberger (Fig. 12)

­ Spine on outer margin of elytral apices with short, robust tip; aedeagus (Fig. 6).......................... A. plasoni dichrosomus Obenberger stat. nov. (Fig. 13)

8 Lateral, prebasal, pronotal parts distinctly elevated; lateral pronotal impressions present; prehumerus hair­like, long, arcuate..... A. pubornatus sp. nov. (Fig. 14)

­ Prebasal, pronotal part uniplanar; lateral pronotal impressions missing or very weak and narrow; prehumerus missing or obsolete, short and sublineal............. 9

9 Prehumerus missing; elytra black with intricate ornamental pubescence; apices separately, medially acuminate...................... A. baoloc sp. nov. (Fig. 15)

­ Prehumerus obsolete; elytra golden­green with distinct, adsutural, turquoise strip (PDV), disk with white, tomentose spots and stripes; apices with outer spina................................................. A. darjiling sp. nov. (Fig. 16)