1      Dorsal surface of head nearly completely black; pronotum distinctly bicolored, anterior third ochraceous, posterior two-thirds black (Celebes)

bicolor Distant

-       Dorsal surface of head mostly ochraceous, with a few minor black markings; pronotum not bicolored, with at most black punctures and markings confined to humeral angles and along anterlateral margins

2

2(1)  Anterolateral pronotal margins, each with a thin black line along entire length from humeral apex to base of head

3

-       Black line on anterolateral pronotal margins confined to apical third

4

3(2)   Mesosternal process produced downward and anteriorly apically; humeral angles large and robust; head only feebly narrowed in front of eyes

-        Mesosternal process roundly truncate, apex not produced downward or forward; humeral angles more narrow and acuminate; head distinctly narrowed in front of eyes (Philippines)

4(2)   Lateral margins of head black

-        Lateral margins of head concolorous with rest of head

5(4)   Humeral angles acute, but not spinose, relatively weakly produced (Philippines)

-        Humeral angles spinose, strongly produced

6(5)   Lateral margins of head subparallel, apex more broadly rounded; antennal segments II-V black (Borneo)

-        Lateral margins of head more tapering, apex narrowly rounded; antennal segments II and III variable, but often brownish (India)

7(6)   Lateral spines of last abdominal segment distinctly larger than those on other abdominal segments; antennal segments II and III usually brownish; rostrum reaching onto base of abdomen

-       Lateral spines of last abdominal segment nearly the same size as those on other abdominal segments; antennal segments II and II usually black; rostrum not reaching onto base of abdomen

8(4)   Lateral margins of head subparallel, apex more broadly rounded; rostrum relatively short, reaching onto base of 4th (3rd visible) abdominal segment; mesosternal process roundly truncate apically (southeast Asia, China)

-        Lateral margins of head more tapering, apex narrowly rounded; rostrum relatively long, reaching to near apex of abdomen; mesosternal process triangular or hook-shaped apically

9(8)   Humeral angles narrowly spinose, mesosternal process distinctly hook-shaped

-        Humeral angles rather robust, apex acute and directed posteriorly; mesosternal process subtriangularly produced apically, not hook-shaped