Key to Species of Paracercopis

1. Forewings distinctly bicolored.......................................................................... 2

- Forewings unicolored................................................................................. 3

2. Head, pronotum and scutellum uniformly shining black; forewings with anterior two-fifths red, or brick-red, or stramineous, posterior three-fifths black (Figs 1A, 1B, 3A); China (Sichuan, Guangxi).................. P. seminigra (Melichar, 1902)

- Head, pronotum and scutellum uniformly orange yellow; forewings with anterior two-fifths orange yellow, posterior three-fifths fuscous; China (Yunnan), Vietnam (Annam)............................................... P. bicolor Liang, 1993

3. Forewings crossed by a straight, transverse, whitish or fuscous-brown fascia before middle.......................... 4

- Forewings not crossed by a straight, transverse, whitish or fuscous-brown fascia before middle....................... 6

4. Aedeagal shaft very broad and distinctly constricted subapically in lateral view (see Liang & Webb, 2002, fig. 11); forewings dull ochraceous, crossed by a straight, narrow, transverse fuscous-brown fascia before middle; northern Burma ......................................................................................... P. atricapilla (Distant, 1908)

- Aedeagal shaft relatively slender and not distinctly constricted subapically in lateral view; forewings crossed by a straight, transverse, whitish fascia before middle................................................................... 5

5. Pronotum with anterior area (excluding marginal areas) fuscous (Figs 1C, 1D); China ...... P. chekiangensis (Ôuchi, 1943)

- Pronotum with anterior area (excluding marginal areas) brown; northeastern India ......... P. darjilingi (Lallemand, 1924)

6. Body smaller, length ♀ less than 9.0 mm; forewings uniformly red (Fig. 5D); southern China ...................................................................................................... P. fuscipennis (Haupt, 1924)

- Body larger, length ♀ 9.8–10.8 mm; forewings uniformly reddish brown (Figs 5A, 5B); south central China (Hubei)......................................................................... P. unicolor Liang, Zhang & Xiao, sp. nov .