TRIBE CALLICHROMINI

View Image Gallery of Tribe Callichromini.

DIAGNOSIS : head somewhat raised between antennal insertion; eye finely facetted; outer lobe of maxillary palp long, with dense brush of hairs at the end; prothorax with tubercle; fore coxal cavity closed posteriorly; scutellum relatively large, triangular; metasternum with scent pore at posterior end; usually metallic color. Male with six visible abdominal segment while female has only five.

Key to genera of Callichromini in Sarawak

1.    Apical antennal segments generally slender, narrower than basal segments; the hind femora gradually swollen. ....…………..................................... 2
Apical antennal segments subclavate, broader and bigger in diameter than basal segments; hind femora clavate ………………………………….... 7

2(l)  Elytra normal, not abbreviated .....................................………………... 3
Elytra abbreviated or narrowly constricted and strongly dehiscent - Nothopeus, PASCOE

3(2) Antennae shorter than body, robust; usually with bright color or bands on

       elytra ................................................................................................... 4

       Antenna usually longer than body or as long as body, filiform; very seldom shorter than body in both sexes (except Anubis); usually metallic blue-green. ..............................................……………………………... 5

4(3) Prothorax strongly and sharply tuberculate; head very much depressed and prolonged below eyes; hind femora usually extended beyond elytral apex in - Pachyteria, SERVILLE
Prothorax not tuberculate at sides; head not much exserted below eyes; hind femora not extended beyond elytral apex in - Zonopterus, HOPE

5(3) Antennae not longer than body, at most a little longer in ; hind femora distinvtively not extended beyond elytral apex; apical antennal segments somewhat gradually thicken. ................................................................. 6
Antennae longer than body in both sexes; about 2 X as long as body in ; 1/3 of hind femora extended beyond elytral apex; prothorax sharply tuberculate at sides; apical antennal segments not thicken - Chloridolum, THOMSON

6(5) Prothorax unarmed, rounded; sulcus between clypeus and frons distinctive;

       antennae clearly shorter than body in both sexes . - Anubis, THOMSON
Prothorax with a weak tubercle at sides; sulcus between clypeus and frons obsolete; antennae reaching elytral apex in , slightly longer in - Polyzonus, CASTELNAU

7(1) Antennae reaching or extended beyond middle of elytra; segment 3 twice as long as scape; scape feebly curved at base; elytra bicostate . - Gauresthes, BATES
Antennae not reaching half of elytra; segment 3 a little longer than scape; scape not curved at base; elytra not bicostate. - Ipothalia, PASCOE