Key to genera of Australian Cixiini

1 Median carina of frons forked........................................................................... 2

- Median carina of frons unforked (Fig. 5C)................................................................. 3

2(1) First hind tarsomere with 8 apical teeth and 4 setae; angle formed by hind margin of pronotum rectangular or moderately obtuse; lateral carinae of pronotum in dorsal view c-shaped, lateral parts directed towards head; vertex in midline at least twice as long as pronotum.............................................................Genus Yanganaka Löcker, 2015

- First hind tarsomere with 5–7 apical teeth and no setae; angle formed by hind margin of pronotum broadly obtuse; lateral carinae of pronotum in dorsal view s-shaped, second bend turning towards mesonotum; vertex in midline about as long as pronotum...........................................................................Genus Aka White 1879

3(1) Second hind tarsomere without platellae but with three or fewer very fine setae.................................... 4

- Second hind tarsomere with four or more platellae........................................................... 6

4(3) Apical transverse carina of vertex deeply u-shaped.............................. Genus Monomalpha Emeljanov, 2000

- Apical transverse carina of vertex v-shaped, shallowly u-shaped or almost straight.................................. 5

5(4) Basal compartment of vertex about as long as wide.................................. ‘ Iolania ’ vittipennis Muir, 1931 [Note: Iolania Kirkaldy, 1902 is a genus restricted to the Hawaiian Islands (Hoch 2006); the generic placement of ‘ Iolania ’ vittipennis will be resolved at a later stage during this research project. ‘ Iolania ’ clypealis Muir, 1931, keys out under Leades Jacobi, 1928, as it appears to be closely related to this genus (Löcker, 2007).]

- Basal compartment of vertex no more than half as long as wide........................Genus Leptolamia Metcalf, 1936

6(3) Second hind tarsomere with two fewer platellae than apical teeth; forewing with CuA2 reaching the margin of forewing in its entire thickness....................................................................................... 7

- Second hind tarsomere with four fewer platellae than apical teeth; forewing with CuA2 either ending well before it reaches the margin of the forewing or reaching the margin but with slightly reduced thickness............................................................................................................ Genus Calamister Kirkaldy, 1906

7(6) Male anal style about as long as 11 th segment (Fig. 23E). Male anal tube with ventral lobe in lateral view usually narrow near base, widening towards apex (Fig. 23E). Forewing with crossvein r-m 1 usually distad or at same level as fork MP1+2 and MP3+4 (Fig. 15E, 28H). Radius anterior (RA) forked or unforked...........................Genus Chidaea Emeljanov

- Male anal style distinctly longer than 11 th segment (11 th segment about 2/3–3/4 as long as anal style). Male anal tube with ventral lobe in lateral view tapering (widest near base). Forewing with crossvein r-m 1 usually distinctly basad of fork MP1+2 and MP3+4. Radius anterior (RA) unforked............................................... Genus Leades Jacobi, 1928