Key to species of Sphaeromacrops Schillhammer

1 Three outer antennal segments white. Female FL: 7.2 mm. Male unknown. Thailand ..................... S. strigosifrons

- Four or five outer antennal segments white................................................................. 2

2 Larger species, FL: 7.5–7.8 mm .......................................................................... 3

- Smaller species, FL: 5.9–7.0 mm......................................................................... 4

3 Head with indistinct cross-shaped impunctate portion between eyes, admedian impunctate patches of the pronotum very inconspicuous. Male FL: 7.5 mm. Aedeagus: Fig. 12 in Schillhammer, 2001. Nepal ............................ S. nepalensis

- Head without cross-shaped impunctate portion between eyes, admedian impunctate patches of the pronotum relatively distinct. Female FL: 7.8 mm. Male unknown. India (Meghalaya).............................................. S. antennalis

4 Admedian impunctate patches of the pronotum distinct, abdominal tergites III and IV with a pair of dark tomentose patches. 5

- Admedian impunctate patches of the pronotum indistinct, abdominal tergites III and IV without dark tomentose patch. Male FL: 5.9–6.3 mm, female FL: 7.0 mm. Aedeagus: Figs. 3–6. China (Yunnan)............................... S. yunnanensis

5 Antennal segment V black, front tarsi with segment V shorter than segments III and IV combined. Male FL: 6.7 mm. Aedeagus: Fig. 13 in Schillhammer, 2001. Bhutan ........................................................... S. varicornis

- Antennal segment V reddish, front tarsi with segment V longer than segments III and IV combined. Male FL: 6.4 mm. Aedeagus: Fig. 14 in Schillhammer, 2001. India (Meghalaya).............................................. S. gracilis