Key to the Liocapsus species (updated from Yasunaga & Schwartz (2007))

1. Scutellum laterally pale................................................................................ 2

- Scutellum entirely shiny dark brown...................................................................... 6

2. Body large, length more than 7.4 mm ..................................................................... 3

- Body length less than 7.3 mm ........................................................................... 4

3. Body length more than 7.6 mm from North India ........................................... L. brevirostris, female

- Body length about 7.4 mm, from China .......................................................... L. inexpectata

4. Cuneus subhyaline, its apex not triangular, tinged with red................................... L. vietnamensis sp. nov.

- Cuneus not hyaline, its apex distinctly triangular, entirely dark brown............................................ 5

5. Found from Nepal, or south area of Himalayas............................................... L. langtang, female

- Found from Taiwan ...................................................................... L. gotohi, female

6. Pronotum almost unicolor, entirely dark brown.............................................................. 7

- Pronotum clearly bicolor, hemelytra glabrous..................................................... L. ochromelas

7. Fore and mid femora mostly dark brown, from India .......................................... L. brevirostris, male

- Fore and mid femora mostly pale brown................................................................... 8

8. Fourth antennal segment more than 1/2 third antennal segment, from Nepal .......................... L. langtang, male

- Fourth antennal segment subequal to 1/2 third antennal segment, from Taiwan .......................... L. gotohi, male