TRIBE CERAMBYCINI
View Image Gallery of Tribe Cerambycini.

DIAGNOSIS : frons usually has furrow or grooved; eye coarsely facetted; submentum distinctive; pronotum usually corrugated; fore coxae separated; intercoxal process wide, dilated or broaden distally; acetabula of fore coxae usually rounded and sometimes weakly angulated on the outer side; mid coxae open to epimera externally.

Key to genera of Cerambycini in Sarawak

1.   Side of prothorax rounded, without tubercle; fore coxae subglobous or subconical ..........................................................................………….....2
Prothorax with prominent and sharp tubercle; fore coxae transverse - Plocaederus, THOMSON

2(1) Antennae 11 segments; filiform or serrate. ........………............................3
Antennae 12 segments; strongly flabellate, external process longer then segment proper - Cyriopalus, PASCOE

3(2) Antennal segment 3 - 10, 5 - 7 or 5 - 10 spined endoapically ..........…….....4 Antennal segment not spined endoapically ..……………………................5

4(3) Antennal segment 3 - 10 spined endoapically; a deep groove between eye; elytra sparsely pubescent - Hoplocerambyx, THOMSON
Antennal segment 5 - 7 or 5 - 10 spined endoapically; a carina between upper eye lobe; elytra densely pubescent, producing a changing patterns depending on direction of light -Trirachys, HOPE

5(3) Antennae stout, serrate or expended ectoapically ...……....................……6
Antennae slender, filiform ...……….....................................................…9

6(5) Antennae distinctively shorter than body in both sexes, at most extended to half of elytra ......................................................................................….7
Antennae longer than body in , as long as body in .......………………8

7(6) Posterior end of prosternal intercoxal process vertical, tuberculate distally - Xoanodera, PASCOE
Intercoxal process of prothorax sloping gradually or declivitous posteriorly - Rhytidodera, WHITE

8(6) Side of prothorax dilated and pointed at middle; antennal segment 3 - 5 slender and cylindrical, apex not thicken; fore intercoxal process with a median  carina, not tuberculate - Trachylophus, GAHAN
Side of prothorax rounded and concave; fore intercoxal process acutely tuberculate; antennal segment 3 - 5 nodus at apex - Zatrephus, PASCOE

9(5) Femora not carinate ..........…...........…………….................................. 10
Femora carinate on each side of hind edge - Calpazia, PASCOE

10(9) Head with a groove between upper eye lobe ..…........…....................…11
Head with a carina between upper eye lobe followed by a deep pit; 3rd antennal segment as long as or slightly longer than scape; swollen and thicken apically - Aeolesthes, GAHAN

11(10) Prothorax transverse; usually larger than 40 mm. .....…........................12
Prothorax as long as wide, or longer than broad; head not grooved between eyes, sometimes slightly ridged. ...........................................................13

12(11) Pronotum entirely rugose; elytra truncated at apex - Massicus, PASCOE
Pronotum with a median flat surface; elytra rounded at apex - Neocerambyx, THOMSON

13(11) 3rd antennal segment short, as long as or only slightly longer than scape, antennae not fringe in both sexes ...........................……………………14
3rd antennal segment very long, 3 X as long as scape, slight incurved; antennae fringed, at least in ; eye divided; posterior of upper lobe smooth - Dialeges, PASCOE

14(13) Antennal scape lacking a cicatrix at apex; 3rd antennal segment short, as long as scape .................................................................................... 15
Scape with a distinct cicatrix at apex; 3rd antennal segment very long, 3 X as long as scape - Zegriades, PASCOE

15(14) Prothorax deeply corrugate; pronotum usually with several pointing tubercles; intercoxal process of mesothorax sloping - Imbrius, PASCOE
Prothorax moderately rugose, corrugation usually transverse; intercoxal process of mesothorax vertical - Dymasius, THOMSON