Key to the Halticini of Australia

1. Metatibial spines in two caudally-directed rows; both sexes macropterous with hemelytra strongly deflected at base of cuneus; male aedeagus and paramere coupled to form scythe-like intromittent organ; female genitalia reduced, with sclerotized rings absent ( Coridromius) ................................................................................................................ 2

- Metatibial spines not in two caudally-directed rows; left paramere never coupled with aedeagus; female genitalia not reduced, with sclerotized rings always present ........................................................................................................... 6

2. Mottled cream and brown coloration, metafemora with dark blotches and transverse stripes, vittae on frons present but indistinct; proepisternum bilobed; pronotum with irregular, deep punctations ..................................................... 3

- Coloration variable but not mottled, metafemora with contrasting dark brown diagonal stripes, frons with strong dark vittae; proepisternum unilobed; pronotal punctures shallow and evenly spaced ................................................ 4

3. Costal margins of hemelytra with small brown spots; anterior lobe of proepisternum shorter than posterior lobe; right paramere without sharp triangular process .................................................................................... C. marmoreus

- Costal margins of hemelytra without small brown spots; both lobes of proepisternum of equal length; right paramere with sharp triangular process ..................................................................................................................... C. chinensis

4. Body size ~ 1.9 – 2.1 mm (from clypeus to cuneus); orange-brown with brown and yellow markings; posterior margin of pygophore with minute tubercle to right of deep, folded groove ................................................... C. pilbarensis

- Body size less than 1.9 mm; coloration variable but not as above, pygophore without minute tubercle to right of folded groove ............................................................................................................................................................... 5

5. Body size ~ 1.5 – 1.7 mm (clypeus to cuneus); coloration highly variable, ranging from nearly all black to pale olive, usually with darker brown markings dorsally; folded groove on posterior margin of pygophore deep ........................ ............................................................................................................................................................. C. chenopoderis

- Body size ~ 1.7 – 1.9 mm (clypeus to cuneus); coloration predominantly light brown with darker brown markings; folded groove on posterior margin of pygophore shallow ................................................................. C. monotocopsis

6. Antennae thin, whiplike and longer than body; head taller than broad ( Halticus)...................................................... 7

- Antennae shorter than body length; head broader than tall ......................................................................................... 8

7. Body dark brown to black; femora dark brown to black with yellow apices; pro- and mesotibiae yellow, metatibia embrowned.......................................................................................................................................... Halticus minutus

- Mostly black, with head and propleuron yellow-orange; fore- and midlimbs yellow ................... Halticus chrysolepis

8. Body black; clothed in hairlike setae and white scalelike setae ................................................. Dampierella schwartzi

- Body mostly black with olive to purple hemelytra; clothed in golden hairlike setae, scalelike setae absent ( Goodeniaphila) ...................................................................................................................................................................... 9

9. Antennae uniformly dark brown to black; legs dark brown to black, paler orange-brown at joints .............................. ................................................................................................................................................... Goodeniaphila cassisi

- Antennae mostly brown, with AII yellow to yellow brown with brown apex; legs yellow, often with subapical brown markings on femora .................................................................................................................... Goodeniaphila schuhi