Key to species of Pseudodendrothrips in Japan and Taiwan

1. Head pale or slightly shaded between antennae (Fig. 10); fore wing uniformly pale............................... mori

-. Head distinctly shaded at least between antennae (Figs 4–9); fore wing shaded to dark (Figs 4, 5) or with brown spots (Figs 8, 9) or longitudinal shaded line (Figs 6, 7), never uniformly pale.................................................. 2

2. Fore wing uniformly dark (Fig. 4); head pale with dark area between antennae, mesothorax to abdomen almost uniformly pale.................................................................................................... 3

-. Fore wing not uniformly dark, at least with pale area at base (Figs 6, 8); head to abdomen with brown markings, not uniformly pale................................................................................................ 4

3. Pronotum usually with longitudinal brown bands laterally (Fig. 5); abdominal tergite IX with S3 setae distinctly stouter than remaining posteromarginal setae (Fig. 43) [Japan, Okinawa]................................................. darci

-. Pronotum uniformly pale (Fig. 4); abdominal tergite IX with S3 setae as slender as remaining posteromarginal setae (Fig. 42)............................................................................................... bhattii

4. Pronotal posteromarginal setae long and stout and similar to posteroangular setae; abdominal tergites with numerous small wrinkles between small longitudinal ridges arising from transverse lines; sternites III–VI with small longitudinal ridges arising from transverse lines throughout; fore wing shaded but without brown spots or longitudinal line [Taiwan]......... fumosus

-. Pronotal posteromarginal setae much smaller than posteroangular setae (Fig. 23); abdominal tergites with dots, but no wrinkles between small longitudinal ridges arising from transverse lines (Figs 28, 38); sternites without small longitudinal ridges arising from transverse lines at least medially (Fig. 30); fore wing with brown spots or longitudinal line....................... 5

5. Abdominal tergites distinctly bicoloured (Figs 6, 7); fore wing pale with brown longitudinal line medially [Japan, Okinawa; Taiwan]....................................................................................... lateralis

-. Abdominal tergites laterally with two brown markings, but not bicoloured (Figs 8, 9, 38–39); fore wing pale with brown spots at base of setae [Japan, Honshu].............................................................. maculatus sp.n.