Key to males of Caenota from Australia

1 First segment of each antennal flagellum elongate, much longer than depth of head (Figs 9 and 10)............ C. monteithi

- First segment of each antennal flagellum normal, much shorter than depth of head (Figs 8 and 11)...................... 2

2(1) Inferior appendages each with inwardly directed apical spine (Neboiss 1984, figs 23 & 28); anterior projection of each antenna slender (Figs 8 and 17)................................................................................. 3

- Inferior appendages without inwardly directed spines (Figs 29 and 50); anterior projection of each antenna expanded (Figs 11, 15, 25 and 46)....................................................................................... 4

3(2) Segment X with apices curved inward, rounded, and without lateral spines (Neboiss 1984, fig. 26); Maxillary palps each having dorsal margin of segment II with large flange (about 1/3rd depth of segment II) (Fig. 17)................. C. nemorosa

- Segment X with apices divergent, angular, and with lateral spines (Neboiss 1984, fig. 22); maxillary palps each having dorsal margin of segment II with small flange (less than 1/3rd depth of segment II) (Fig. 8)........................ C. galeata

4(2) Anterior antennal projections larger than posterior antennal projections (Figs 25 and 27); last segment (segment V) of each maxillary palp long (Fig. 26)..................................................................... C. cudonis

- Anterior antennal projections smaller than posterior antennal projections (Figs 11, 12 and 45); last segment of each maxillary palp short (Figs 11, 12, 14, 15, 46, 47)..................................................................... 5

5 (4) Hind wings each with fold in posterior margin (Mosely & Kimmins 1953, fig. 38a); anterior antennal projections each with small rounded branch on lateral surface subapically; 1st segment of each maxillary palp with hook-like appendage on apicomedial margin (Figs 14, 15); abdomen, dorsally with dense setae along midline........................... C. simulans

- Hind wings each with or without fold; anterior antennal projections without small rounded subapical branches; 1st segment of each maxillary palp without hook-like appendage; abdominal terga without dense setae.............................. 6

6(5) Second segment of each maxillary palp with circular brush of large dark setae (Figs 11, 12).................... C. plicata

- Second segment of each maxillary palp without circular brush of large dark setae, instead with sparser whorl of setae (Figs 46, 47)...................................................................................... C. equustagna