Strepterothrips species (apterae) from Australia

1. Mesoeusternum anterior margin entire (Fig. 16); antennal segment III at least 1.5 times as long as wide (Fig. 26); pelta without discal setae.......................................................................................... 2 -. Mesoeusternum divided longitudinally (Figs 17–19); antennal segment III shorter and broader, no more than 1.3 times as long as wide (Figs 20–25); pelta often with discal setae............................................................ 3 2. Metanotum with 20–50 short pale setae distributed evenly across sclerite (Fig. 41); pronotum with discal setae distributed almost evenly (Fig. 41), postero-median third with 8–10 setae; meso and metanota coarsely tuberculate (Fig. 41)..................................................................................................... tuberculatus -. Metanotum with less than 10 setae on anterior two-thirds, posterior third with narrow transverse band of 20–30 setae (Fig. 40); pronotum medially and posteriorly with 4–6 setae, anterolaterally with dense groups of 25–30 setae (Fig. 39); meso and metanota finely and densely tuberculate (Fig. 40)..................................................... verruculus s p.n. 3. Antennal segment III clear yellow, or brownish-yellow, in contrast to dark brown IV (Figs 23–24); antennal segment IV with three sense cones...................................................................................... 4 -. Antennal segment III as dark brown as IV (Figs 20–22); antennal segment IV with two sense cones................... 5 4. Antennal segment II as yellow as III (Fig. 24), segment III short, 1.1 times as long as wide; postocular setae less than 0.5 as long as fore tarsal width; apterae with posteromarginal setae on tergites II–V scarcely longer than apical width; tube less than 2.8 times as long as basal width (Fig. 45)............................................................ orientalis -. Antennal segment II brown (Fig. 23); segment III 1.2–1.3 times as long as wide; postocular setae as long as fore tarsal width (Fig. 30); apterae with posteromarginal setae on tergites II–V at least twice as long as apical width; tube at least 3 times as long as basal width (Fig. 44)...................................................................... okajimai sp.n. 5. Antennal segment III with one small fine sense cone......................................................... 6 -. Antennal segment III small, without any sense cones........................................................ 7 6. Metanotum with no more than 12 small, fine setae (Fig. 36); pelta without discal setae; pronotum weakly sculptured with no more than 16 fine setae........................................................................... apterus -. Metanotum with about 30 short, blunt setae (Fig. 37); pelta with discal setae; pronotum strongly reticulate with more than 24 small stout discal setae (Fig. 38)............................................................... barbatus sp.n. 7. Pelta with no discal setae (Fig. 42); tube of female more than 2.2 times longer than basal width; antennal segments IV–V with distinct sculpture lines......................................................................... moffati sp.n. -. Pelta with 2 or more discal setae (Fig. 34); tube of female less than 2.0 times as long as basal width; antennal segments IV–V with no sculpture lines................................................................................. 8 8. Antennal segment III goblet-shaped, maximum width no more than 1.1 times apical width (Fig. 20); pronotal midlateral setal pair not developed; tergites III–IV with discal setae pointed............................................ arake sp.n. -. Antennal segment III maximum width 1.4 times apical width (Fig. 25); pronotal midlateral setal pair capitate; tergites III–IV with discal setae bluntly pointed.............................................................. parvulus sp.n.