Key to Thripidae genera with species dependent on Poaceae in Australia

1. Female with sternite VII posteromarginal setal pairs S1 & S2 arising closer to each other than to setal pair S3 (Fig. 40)..... 2

-. Sternite VII pairs of posteromarginal setae arising equidistant from each other (Figs 10, 36).......................... 3

2. Prosternum with no setae; prosternal ferna complete medially; ocellar setae pair III arising within triangle (Fig. 38). Exothrips

-. Prosternum with 2 or more setae, prosternal ferna divided medially (Fig. 44); ocellar setae pair III arising outside triangle (Fig. 39)....................................................................................... Parexothrips

3. Pronotum with no long setae at posterior angles............................................................. 4

-. Pronotum with at least one pair of prominent posteroangular setae............................................. 15

4. Wings absent, or reduced to lobes no longer than width of thorax................................................ 5

-. Wings fully developed................................................................................. 10

5. Prosternum with one or more pairs of setae (Fig. 45)................................................. Caprithrips

-. Prosternum without any setae........................................................................... 6

6. Abdominal sternites with transverse row of discal setae (cf Fig. 10).............................................. 7

-. Abdominal sternites with no discal setae (cf Fig. 36).......................................................... 8

7. Antennae 6-segmented; tarsi 1-segmented......................................................... Aptinothrips

-. Antennae 8-segmented; tarsi 2-segmented................................................. Ozanaphothrips [part]

8. Abdominal sternites III–VI posterior margins with craspedum deeply lobed between marginal setae........... Apterothrips

-. Abdominal sternites III–VI with no craspedum.............................................................. 9

9. Body dark brown, strongly reticulate; antennae 7-segmented......................................... Moundothrips

-. Body variable, yellow to brown, never strongly reticulate; antennae 8- or 9-segmented, segment VI sometimes with incomplete suture............................................................................. Anaphothrips [in part]

10. Antennae 7-segmented; fore wings without prominent setae................................................... 11

-. Antennae 8- or 9-segmented; fore wings with setae on veins including costa...................................... 12

11. Body colour pale yellow, including antennal segments I – V; metathoracic endofurca elongate lyre-shaped.......... Edissa

-. Head and thorax dark brown, strongly reticulate, abdomen golden; metathoracic endofurca transverse........ Phibalothrips

12. Body dark brown; head and pronotum reticulate with markings inside the reticles; hind coxae internally with prominent coiled apodeme; metathoracic endofurca elongate lyre-shaped............................................... Caliothrips

-. Body colour various, yellow or brown or bicoloured; reticulation, when present, without internal markings; hind coxae internally without a coiled apodeme; metathoracic endofurca transverse............................................. 13

13. Abdominal sternites with transverse row of discal setae...................................... Ozanaphothrips [part]

-. Abdominal sternites with no discal setae.................................................................. 14

14. Ocellar setae I absent; antennal segments III & IV with sensorium simple; metanotum with complex sculpture lines (Fig. 90); ovipositor weak, not serrate (Fig. 91); metapre-episternum broadly band-like.............................. Takethrips

-. Ocellar setae I present; antennal segment IV with sensorium forked, III with sensorium sometimes simple; metanotum with reticulate sculpture; ovipositor serrate; metapre-episternum slender and tapering laterally............ Anaphothrips [in part]

15. Tergites V–VII with paired ctenidia laterally (Figs 30, 82).................................................... 16

-. Tergites V–VII without paired lateral ctenidia.............................................................. 17

16. Antennal segments III–IV with sensoria simple.................................................... Bolacothrips

-. Antennal segments III–IV with sensoria forked................................................ Stenchaetothrips

17. Female abdominal tergite X with pair of stout thorn-like setae.......................................... Limothrips

-. Female abdominal tergite X without such setae............................................................. 18

18. Sensorium on antennal segment III simple, on IV usually simple but rarely forked................................. 19

-. Sensorium forked on antennal segments III and IV.......................................................... 28

19. Prosternal basantra with 1 or more pairs of setae (Fig. 58)..................................................... 20

-. Prosternum without any setae.......................................................................... 24

20. Fore tibia inner apex with broadly flattened or bifurcate seta; head strongly prolonged in front of eyes; ocellar setae pair I absent.................................................................................... Organothrips

-. Fore tibia inner apex without modified seta; head scarcely prolonged in front of eyes; ocellar setae pair I present........ 21

21. Abdominal tergites with no craspedum including segment VIII (Fig. 46); sternites with no discal setae........ Karphothrips

-. Tergites II–VIII with broad craspedum on posterior margin (Figs 47, 62); sternites with or without row of discal setae.... 22

22. Abdominal sternites II–VI posterior margin with craspedum of five broad lobes (Fig. 49); ocellar setae I absent; fore wing clavus with discal seta present; sternites with no discal setae....................................... Kranzithrips gen.n.

-. Abdominal sternites II–VI posterior margin either with dentate craspedum or with no craspedum; ocellar setae I present; fore wing clavus with no discal seta; sternites with transverse row of discal setae..................................... 23

23. Abdominal sternites with dentate craspedum (Figs 76, 78); maxillary palps 3-segmented.................... Monothrips

-. Abdominal sternites with no craspedum (Fig. 60); maxillary palps 2-segmented.................... Masamithrips gen.n.

24. Fore wing clavus with no discal seta (Fig. 13); sternites with transverse row of discal setae (Figs 10, 17)............... 25

-. Fore wing clavus with discal seta (Fig. 35); sternites without discal setae (Fig. 36)................................. 26

25. Body and legs yellow; pronotum with 2 pairs of posteroangular setae (Figs 1, 5); mesothoracic furca usually without spinula; metanotum without campaniform sensilla (Fig. 1)............................................. Aliceathrips gen.n.

-. Body brown or bicoloured; pronotum with one pair of small posteroangular setae; mesothoracic furca with short spinula; metanotal campaniform sensilla present or absent........................................... Ozanaphothrips [part]

26. Pronotum weakly trapezoidal, head not unusually small (Fig. 31); antennal segment II symmetrical; tergal campaniform sensilla close to posterior margin (Fig. 33); metapre-episternum transversely band-like; female macropterous dark brown; male sometimes bicoloured, macropterous or micropterous............................................ Bregmatothrips

-. Pronotum strongly trapezoidal, much larger than head (Fig. 23); antennal segment II often strongly asymmetric and prolonged laterally; tergal campaniform sensilla distant from posterior margin; metapre-episternum scarcely prolonged laterally; female macropterous, brown, sometimes bicoloured when teneral; male apterous........................................ 27

27. Mesothoracic furca T-shaped with broad lateral flanges, invaginations close together near mid-line (Fig. 25).... Chirothrips

-. Mesothoracic furca weak, without broad lateral flanges, invaginations widely separated (Fig. 24)............. Arorathrips

28. Fore tibial apex with 2 claws, rarely with one; sensorium on antennal segment VI with greatly enlarged, broadly oval base.......................................................................................... Odontothripiella

-. Fore tibia without an apical claw; sensorium on antennal segment VI with circular base............................ 29

29. Fully apterous, head with no ocelli; tergite IX with 2 pairs of stout setae [Macquarie Island]............... Physemothrips

-. Macropterous, rarely micropterous; setae on tergite IX slender................................................. 30

30. Abdominal tergites II–VII with no craspedum; tergites with little sculpture; female with ovipositor valves weakly sclerotised and not serrate............................................................................. Plesiothrips

-. Abdominal tergites II–VII with lobed craspedum and many transverse striae (Fig. 96); female with ovipositor valves strongly sclerotised and serrate.................................................................... Striathrips gen.n.