Key to the species of Eurylychnus

1 Pronotum with 3–5 setae on each side (Fig. 6); males with squamose setae underneath protarsi on protarsomeres 1–3 (Fig. 1A)................................................................................................ 2

- Pronotum with a single seta on each side; males without squamose setae underneath protarsi (Fig. 1B).................. 3

2 (1) Elytral striae 1–4 weakly to moderately defined; legs piceous; transverse impression behind the eyes impunctate; apex of aedeagus median lobe without a tooth (Fig. 5F) or with an obsolete tooth on the ventral side. Dorrigo, New England National Park, and Barrington Tops National Park (NSW)............................................ E. ovipennis Sloane

- Elytral striae 1–4 well defined; legs red; transverse impression behind the eyes punctate; apex of aedeagus median lobe with a distinctive broad tooth on ventral side (Fig. 5C). Wetter forests of south-eastern Australia, including New South Wales, Australian Capital Territory and Victoria ............................................. E. dyschirioides Castelnau

3 (1) Elytral surface smooth, glossy, striae obsolete; without reticulation of very fine meshes.............................. 4

- Elytral surface shiny or lustrous, striae well defined; with reticulation of very fine meshes at least apically............... 5

4 (3) Pronotum constricted in posterior 1/3, with sides slightly sinuate; pronotal foveae present. North-eastern Tasmania ............................................................................................ E. femoralis Sloane

- Pronotum not constricted posteriorly, sides straight before basal angles; pronotal foveae absent. Wilsons Promontory and Tarra Valley (VIC).......................................................................... E. kershawi Sloane

5 (3) Body size <14.2mm; parascutellar striole joined to apical portion of stria 1 (Fig. 7B); basal groove of elytra without obsolete punctures; ventrites 3–5 each with 2 setae. Otway Ranges and Mt Macedon (VIC)................... E. victoriae Sloane

- Body size> 16.5mm; parscutellar striole isolated from apical portion of stria 1 (Fig. 7A) (sometimes hard to see); basal groove of elytra usually with obsolete punctures; ventrites 3–5 lacking setae............................................ 6

6 (5) Elytra with 7 striae, striae 3 and 4 diverging basally; metatrochanters each with a seta. Wetter forests of south-eastern Australia, including New South Wales, Australian Capital Territory and Victoria .......................... E. blagravei Castelnau

- Elytra with 8 striae, striae 3 and 4 converging or sub-parallel basally; metatrochanters lacking setae.................... 7

7 (6) Elytral striae well defined, with striae 8 distinct. New England National Park (NSW)................. E. regularis Sloane

- Elytral striae weakly defined, with striae 8 faint. Barrington Tops National Park (NSW)............ E. cylindricus Sloane