Key to Mesandrothrips species from Australia

1. Pronotum with am setae as long as aa setae (Figs 23–25)................................................. 2

-. Pronotal am setae minute, no larger than discal setae (Figs 21, 22).............................................. 4

2. Antennal segment III yellow (Fig. 13) in contrast to segments I–II and IV–VIII that are uniformly brown. kurandae sp.n.

-. Antennal segment III not sharply different in colour from other segments........................................ 3

3. Antennal segments IV–VI light brown to brown, III paler at base (Fig. 16)................................... pictipes

-. Antennal segments III–VI bicoloured, brown with bases sharply paler (Fig. 15).......................... oleariae sp.n.

4. Mesopresternum incomplete or very slender medially (Fig. 6)................................................. 5

-. Mesopresternum complete medially and broadly boat-shaped (Figs 7, 8)......................................... 7

5. Fore tarsal tooth acute and almost as long as tarsal width (Fig. 22); micropterous; longest sense cone on segment III no more than 0.6 as long as segment width........................................................... lamingtoni sp.n.

-. Fore tarsal tooth small or minute in both sexes; macropterous; longest sense cone on segment III 0.9 as long as maximum width of segment..................................................................................... 6

6. Mesopresternum slender and continuous medially; antennal segment III slender, at least 1.7 times as long as wide, IV–VI yellow at base (Fig. 12)............................................................................ inquilinus

-. Mesopresternum divided into two separate triangles (Fig. 6); antennal segment III stouter, scarcely 1.5 times as long as wide (Fig. 18), IV–VI scarcely paler at base.................................................................. darci

7. Postocular setae and fore wing sub-basal setae S3 pointed [tergite IX setae S1 finely pointed and almost as long as tube]................................................................................................................................. reedi

-. Postocular and fore wing sub-basal setae S3 with apices capitate............................................... 8

8. Pronotum slightly longer than wide (Fig. 19); antennal segment III twice as long as wide; fore femora swollen, fore tibiae stout, fore tarsal tooth massive (Fig. 5)..................................................... austrosteensia sp.n.

- Pronotum wider than long; antennal segment III less than 1.8 times as long as maximum width; fore femora slender (Fig. 21)................................................................................................. 9

9. Antennal segment III 1.5 times as long as maximum width (Fig. 10); tergite IX setae S1 with apices pointed...... clavipes

-. Antennal segment III 1.3 times as long as maximum width (Fig. 11); tergite IX setae S1 with apices capitate googongi sp.n.