Key to Monteithocanthon species

1. Pygidial groove curved and deep; elytral epipleurae narrower in basal 1/2; elytral striae visible or obsolete; male metatibiae variously bent and with inner apex produced; fully winged or short winged........................................2

- Pygidial groove straight and shallow; elytral epipleurae wider in basal 1/2; elytral striae obsolete; male metatibiae only slightly bent and inner apex not produced; wings absent..............................................................5

2. Elytral striae obsolete; sides of pronotum not margined; hypomeral striae short or obsolete; short winged; male metatibiae as in Fig. 8 B; aedeagus as in Fig. 9 B; Mount Elliot, northern Queensland ...................................................................................................... Monteithocanthon elliotensis Gunter & Weir new species

- Elytra with at least striae 2–5 clearly visible on disc; sides of pronotum finely margined; hypomeral striae longer, 1/3 to 1/2 as long as hypomeron; fully winged; male metatibiae as in Fig. 8 A, D–E............................................3

3. Elytral striae 1–6 clearly visible on disc, 6 often reaching base, intervals at least partly reticulate; elytra appearing markedly flanged along outer edge from near base to apex (Fig. 10 A); lateral lobe of metaventrite narrowly bordered anteriorly (Fig. 7 G); male with tubercle on metaventrite; male metatibiae as in Fig. 8 A; aedeagus as in Fig. 9 A; wet tropics of northern Queensland.................................................................. Monteithocanthon arator (Matthews)

- Elytra with only striae 1–5 or 2–5 clearly visible on disc, 6 obsolete, intervals not reticulate; elytra not appearing markedly flanged; lateral lobe of metaventrite broadly bordered anteriorly (Fig. 7 K); male without tubercle on metaventrite; male metatibiae as in Fig. 8 D–E................................................................................... 4

4. Hypomeral striae about 1/2 as long as hypomeron and closely paralleling margin of pronotum; male metaventrite not depressed between mesocoxae; male metatibiae as in Fig. 8 E; aedeagus as in Fig. 9 E; Koombooloomba area, northern Queensland ...................................................... Monteithocanthon koombooloomba Gunter & Weir, new species

- Hypomeral striae not more than 1/3 as long as hypomeron and diverging from margin of pronotum; male metaventrite slightly depressed between mesocoxae; male metatibiae as in Fig. 8 D; aedeagus as in Fig. 9 D; Crater National Park, northern Queensland ................................................. Monteithocanthon paraarator Gunter & Weir, new species

5. Sides of pronotum finely margined; hypomeral striae short; pygidial groove about 1/3 as wide as pygidium; eyes narrow, separated by about 20 eye widths; male metatibiae as in Fig. 8 C; aedeagus as in Fig. 9 C; high altitudes of Lamington National Park and Springbrook National Park, southeastern Queensland ......................... Monteithocanthon glaber (Matthews)

- Sides of pronotum not margined; hypomeral striae longer, about 1/2 as long as hypomeron; pygidial groove about 1/2 as wide as pygidium; eyes narrow, separated by about 30 eye widths; male metatibiae as in Fig. 8 F; aedeagus as in Fig. 9 F; Stirling National Park and Walpole National Park, southwestern Western Australia ................................................................................................ Monteithocanthon peckorum Gunter & Weir, new species