Key to females of Neohirasea Rehn, 1904 from China

1. Anterodorsal, posterodorsal, anteroventral and posteroventral carinae of femora distinctly armed with serrations or waved with small elevations...................................................................................... 2.

- Anterodorsal, posterodorsal, anteroventral and posteroventral carinae of femora lacking elevations or indistinctly waved........................................................................................................ 4.

2. Anterodorsal, posterodorsal, anteroventral and posteroventral carinae of femora armed with serrations.................................................................................................. N. fenshuilingensis sp. nov.

- Anterodorsal, posterodorsal, anteroventral and posteroventral carinae of femora waved with small elevations............ 3.

3. Mesonotum with one tuberculate hump on mesonotum...................................... N. pengzhongi sp. nov.

- Mesonotum with two tuberculate humps on mesonotum...................................... N. wangpengi sp. nov.

4. Eighth abdominal tergum with a laminate crest............................................................. 5.

- Eighth abdominal tergum unarmed or with a tubercle........................................................ 6.

5. Medium to large size, body length longer than 55 mm ..................... N. unispina unispina sp. nov. & subsp. nov .

- Small size, body length shorter than 55 mm ....................................... N. unispina parvula subsp. nov .

6. Lateral margins of mesonotum with long spine-like tubercles.......................................... N. stephanus

- Lateral margins of mesonotum with small granules and/or short blunt tubercles................................... 7.

7. Small to medium-sized, body length shorter than 60 mm ..................................................... 8.

- Medium to large size, body length longer than 60 mm ....................................................... 12.

8. Pronotum with a pair of small granules on anterior margin.................................. N. nanlingensis sp. nov.

- Pronotum with a pair of spine-like tubercles on anterior margin................................................ 9.

9. Mesonotum more than two-and-one-half times longer than pronotum........................................... 10.

- Mesonotum less than two-and-one-half times longer than pronotum............................................ 11.

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

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

11. Mesopleurae with a spine-like tubercle near posterior area, metapleurae with a spine-like mediolateral tubercle............................................................................ N. hujiayaoi hujiayaoi sp. nov. & subsp. nov .

- Mesopleurae lacking spine-like tubercle near posterior area, metapleurae lacking spine-like mediolateral tubercle........................................................................... N. hujiayaoi shengtangshanensis subsp. nov .

12. Mesonotum more than three times longer than pronotum, posterior area of metapleurae with a large pale white marking................................................................................................. N. japonica

- Mesonotum less than three times longer than pronotum, posterior area of metapleurae with a small pale white marking............................................................................................ N. hongkongensis