Psalidothrips

Key to Australian Psalidothrips

1. Pronotal aa well-developed, often twice as long as pronotal discal setae (Fig. 11)................................... 2 -. Pronotal aa minute, about as long as pronotal discal setae, or shorter (Fig. 7)..................................... 11 2. Pronotal am well-developed, longer than pronotal discal setae (Fig. 10).......................................... 3 -. Pronotal am minute or as long as pronotal discal setae (Fig. 7).................................................. 5

3. Vertex anteromedially with weakly or strongly net-like reticulation (Fig. 4); fore tarsal tooth present in male, absent in female...................................................................................... cecryphalus sp.n.

-. Vertex with sculpture only near posterior margin (Fig. 10); fore tarsal tooth absent in both sexes....................... 4

4. Antennal segment III without sense cones (or with one very small sense cone), tergites II–V each with one pair of well-developed median setae (Fig. 41); male sternite VIII with complete pore plate (Fig. 27); both sexes apterous... minantennus sp.n.

-. Antennal segment III usually with 0+1 or 0 1 +1 sense cones, tergites II–V median setae undeveloped, male pore plate on sternite VIII usually divided into two parts (Fig. 29), rarely complete................................ taylori Mound & Walker

5. Pelta eroded to small discrete sclerite separate from anterior margin of tergite II (Figs 41, 45, 46); male without fore tarsal tooth............................................................................................... 6

-. Pelta well developed and confluent with anterior margin of tergite II (Figs 38–40); male with or without fore tarsal tooth... 7

6. Antennal segment VIII broadly joined to VII; male sternite VIII with slender transverse pore plate (Fig. 28).... postlei sp.n.

-. Antennal segment VIII weakly constricted to base; male sternal pore plate comprising two small transverse lateral areas (cf. Fig. 29)............................................................................... greensladeae sp.n.

7. Antennal segment III wider than long, base of VIII not clearly narrower than apex of VII (Fig. 34) [tergite IX setae S1 longer than tube]................................................................................. platetus sp.n.

-. Antennal segment III clearly longer than wide (Figs 35, 37), VIII weakly or strongly narrower at base than VII at apex..... 8

8. Antennal segment III with 2 slender sense cones, VIII weakly narrowed to base.................................... 9

-. Antennal segment III with 1 sense cone, VIII sharply constricted at base........................................ 10

9. Head and pronotum equally light brown to yellow; male without fore tarsal tooth, and no pore plate on sternite VIII.................................................................................................. wellsae sp.n.

-. Head paler than pronotum; male with stout fore tarsal tooth, pore plate broadly transverse across sternite VIII (cf. Fig. 24)........................................................................................... daguilari sp.n.

10. Antennal segment IV sub-globose (Fig. 31) particularly in apterae; compound eyes of apterae with 4–10 (usually 6) facets (Fig. 3).................................................................................. brittoni sp.n. [in part]

-. Antennal segment IV more slender (Fig. 35) [macropterae not known]; compound eyes of apterae with 2 large and 1–2 small facets...................................................................................... trivius sp.n.

11. Antennal segment III with 3 sense cones.................................................................. 12

-. Antennal segment III with 1 or 2 sense cones.............................................................. 13

12. Antennal segments III–V yellow, VII–VIII brown; legs and abdomen yellow; mesopresternum with posterior margin entire........................................................................................... bipictus sp.n.

-. Antennal segments III–VIII almost uniformly brownish yellow; femora and abdomen brown; mesopresternum posterior margin weakly eroded and not confluent with anterior margin of mesoeusternum....................... gloriousi sp.n. [in part]

13. Head dark brown contrasting with yellowish pronotum and pale abdomen (Figs 2, 3, 15)............................ 14

-. Head and pronotum not strongly differing in colour (Fig. 7)................................................... 15

14. Mesopresternum complete, both sexes macropterous; tergites each with 2 pairs of wing-retaining setae (Fig. 39).. verus sp.n.

-. Mesopresternum almost absent, including in macropterae; females macropterous and apterous, males apterous; tergites with one only pair of wing-retaining setae (cf. Fig. 40)............................................ brittoni sp.n. [in part]

15. Mid and hind tibiae yellow in contrast to dark brown femora; fore wing with 4–5 duplicated cilia.... gloriousi sp.n. [in part]

-. Mid and hind tibiae and femora similar in colour, usually yellowish; fore wing either with no more than 4 duplicated cilia or with none at all [macropterae or apterae].................................................................. 16

16. Apterae with compound eyes multifaceted with about 25 facets (Fig. 5), macropterae not known [male with transverse pore plate]....................................................................................... howei sp.n.

-. Apterae with compound eyes reduced to 10 facets or less (Fig. 13)............................................. 17

17. Sternite VIII of male with small oval pore plate medially (Fig. 25); macropterae with 2–4 duplicated cilia on fore wing............................................................................................. driesseni sp.n.

-. Male with pore plate transverse fully across sternite VIII (Fig. 30); macropterae with no duplicated cilia on fore wing.................................................................................................. tritus sp.n.