Key for the I. haemorrhoidalis species-group:

1 Elytra yellow to orange, not dark and without metallic tinge................................................... 2

- Elytra green-olivaceous, sometimes with a slight metallic tinge..................................................3

2 Head yellow or orange..................................................................................4

- Head green or sooty....................................................................................7

3 Last abdominal segment, femora and head yellow, elytral venation faint, but subhumeral vein visible....... unicostata (Pic)

- Last abdominal segment, femora and head green-olivaceous, elytral venation absent...................... .. josefi Švihla

4 First two antennal segments completely yellow or dark brown, abdomen only partly yellow.......................... 5

- First two antennal segments only partly yellow, abdomen completely yellow, parameres well developed with two long apical apodemes (Figs. 13,15)................................................................................ 6

5 First two antennal segments yellow, elytra egg-yolk yellow, first abdominal segment egg-yolk yellow, pronotum distinctly longer than wide, parameres short, not developed into long apical apodemes (Fig. 11), aedeagus short, with a well-developed apical hook directed dorsally (Fig. 12)........................................................... thibetana Pic

- First two antennal segments sienna, elytra tangerine, first abdominal segment sienna, pronotum as long as wide (Fig. 10), genitalia unknown....................................................................... thailandica n. sp.

6 Femora yellow only in the basal third, parameres divergent (Fig. 13), aedeagus with a dorsal subapical spine (Fig. 14).............................................................................................. nigripes Švihla

- Femora completely yellow, parameres convergent (Fig. 15), aedeagus curved ventrally and with an apical hook directed dorsally (Fig. 16)................................................................................ laosensis Švihla

7 Pronotum dark green, femora completely yellow, parameres shorter (Fig. 17), aedeagus straight, with a well-developed hook curved dorsally (Fig.18)............................................................... haemorrhoidalis (Pic)

- Pronotum yellow with a pair of dark green pre-basal spots, parameres longer (Fig. 19), aedeagus with a blunt kook (Fig. 20)…..................................................................................... binotata (Pic)