Key to species of genus Trachypeplus occurring in China

1. Body elongate-ovate (Figs.1–8); costal area relatively broad, bi- or triseriate; rostral sulcus not parallel, cordate on metasternum, or nearly parallel but relatively broad (Figs. 29–33)...................................................... 2

- Body nearly parallel-sided (Figs. 9–11); costal area narrow, uniseriate at its length; rostral sulcus much narrow, straight, nearly

parallel (Figs. 34–36)..................................................................................7 2. Paranota along the lateral margins of pronotum folded a longitudinal ridge, these divided paranota into two parts, ventral and dorsal...................................................................... Trachypeplus depressus sp. nov.

- Paranota without such longitudinal ridges.................................................................. 3

3. Body dorsally armed with many tubercle-spines, especially on paranota and outer margins of hemelytra (Figs. 4–6)........ 4

- Body dorsally not armed with such tubercle-spines, or with very few tubercle-spines on the anterior part of paranota (Figs. 1– 3, 7–8).............................................................................................. 5

4. Hood relatively large, with the dorsal margin arched distinctly in lateral view (Fig. 15); tubercle-spines on hood, paranota and hemelytra short, the tubercle nearly equal to spine; rostral sulcus on mesosternum nearly parallel, but widened on metasternum, there cordate (Fig. 33)........................................................ T. jacobsoni Horváth, 1926

- Hood relatively small, flattened above, with the dorsal margin nearly straight in lateral view (Fig. 14); tubercle-spines on hood, paranota and hemelytra long, the tubercle two times as long as spine; rostral sulcus nearly parallel, but slightly widened posteriorly (Fig. 32)........................................................................... T. jingae sp. nov.

5. Paranota relatively broad, quadriseriate, widest distance between outer margins and lateral carinae narrower than or nearly equal to that between lateral and median carinae (Fig. 21)............................. T. malloti Drake and Poor, 1936

- Paranota relatively narrow, bi- to triseriate, widest distance between outer margins and lateral carinae much distinctly wider than that between lateral and median carinae (Figs. 22–23)..................................................... 6

6. Dorsal margin of hood arched in lateral view (Fig. 13); ridges of areolae on paranota covered with many small tubercle-hairs (Fig. 7 b); costal area relatively broad, mostly triseriate (Fig. 7 a)............................... T. parafulgoris sp. nov.

- Dorsal margin of head near straight in lateral view (Fig. 16); paranota without such tubercle-hairs (Fig. 8 b); costal area relatively narrow, uniformly biseriate at its length (Fig. 8 a)..................................... T. fulgoris (Drake, 1937)

7. Body relatively small, length less than 3.0 mm (Figs. 9); median portion of M+R vein on hemelytra raised, these black; each paratergite IX of female with an outer process (Figs. 41)..................................... T. chinensis Drake 1936

- Body relatively large, length more than 3.0 mm (Figs. 10–11); median portion of M+R vein on hemelytra not raised; each paratergite IX of female without such outer process (Figs. 42–43)...............................................8

8. Paranota relatively broad, five areolae broad at widest part, with outer margins anteriorly and posteriorly nearly in contact with lateral carinae (Fig. 27); transverse crest of paranota greatly elevated, distinctly higher than median carina (Fig. 18); three carinae slightly and uniformly raised at its length, median carina nearly as high as lateral carinae......... T. magnus Jing, 1981

- Paranota relatively narrow, four areolae broad at widest part, with outer margins of paranota anteriorly and posteriorly separating from lateral carinae by a distinct space, or only anteriorly nearly in contact with lateral carinae (Fig. 28); transverse crest of paranota elevated, but lower than median carina (Fig. 19); median carina on top of pronotal disc distinctly elevated, there biseriate, higher than lateral carinae......................................................... T. yunnanus Jing, 1980