Key to males of Neohirasea Rehn, 1904 from China

1. Thorax lacking spines................................................................ N. pengzhongi sp. nov.

- Thorax armed with spine-like tubercles or spines............................................................ 2.

2. Pronotum unarmed................................................................................... 3.

- Pronotum with paired spine-like tubercles or spines on anterior margin.......................................... 4.

3. Medium-sized, body length longer than 45 mm ........................... N. unispina unispina sp. nov. & subsp. nov .

- Small size, body length shorter than 40 mm ........................................ N. unispina parvula subsp. nov .

4. Anteroventral and posteroventral carinae of mesofemora and metafemora with spines near apices..................... 5.

- Anteroventral and posteroventral carinae of mesofemora and metafemora unarmed near apices....................... 8.

5. Anteroventral and posteroventral carinae of mesofemora and metafemora with one spine near apices....................................................................................................... N. wangpengi sp. nov.

- Anteroventral and posteroventral carinae of mesofemora and metafemora with two spines near apices.................. 6.

6. Paired spines on pronotum erect............................................................ N. hongkongensis

- Paired spines on pronotum curved and pointing forwards..................................................... 7.

7. Lateral margins of mesonotum with prominent and pointed granules.......................... N. guangdongensis actua

- Lateral margins of mesonotum with indistinct and rounded granules................. N. guangdongensis guangdongensis

8. Anal abdominal segment broader than long, with small notch on posterior margin............... N. nanlingensis sp. nov.

- Anal abdominal segment longer than wide, with broad emargination on posterior margin............................ 9.

9. Mesopleurae with a posterior spine, metapleurae with a medial spine........ N. hujiayaoi hujiayaoi sp. nov. & subsp. nov .

- Mesopleurae lacking posterior spine, metapleurae lacking medial spine........ N. hujiayaoi shengtangshanensis subsp. nov .