Key to males of Scaphoideus with bicolored forewings

1. Style apophysis short and connective processes needlelike (Fig. 3 G, H)........................................... 2

- Style apophysis elongate and connective processes stout, not needlelike (Fig. 2H, J)................................. 3

2. Subgenital plate long, 2.5 times longer than greatest width near base; aedeagal shaft with a pair of apical processes (India: Karnataka).............................................................. S. bicoloratus Viraktamath & Mohan

- Subgenital plate elongate, 3.5 times longer than greatest width near base (Fig. 3 H); aedeagus with a single process (Fig. 3 D, E) (China: Shandong).................................................................. S. taishanenisis sp. nov.

3. Aedeagal processes shorter, broader and curved in the shape of horns (Fig. 2C–G) (China: Guangdong).................................................................................................... S. dinghuensis sp. nov.

- Aedeagal processes longer, slender and straight (China: Taiwan)............................ S. pingtungisis (Dai and Li)