Subg. Onthophagus (s. str.) Latreille, 1802

Onthophagus Latreille, 1802, Hist. Nat. Crust. Ins., 3: 141 (Type species: Scarabaeus taurus Schreber, 1759).

Key to species of Onthophagus (s. str.) from Hong Kong.

1 Head with one long slender horn in male ................................................................... Onthophagus (s. str.) hastifer Lansberge, 1885

Head with two long slender horns in male ................................................................... Onthophagus (s. str.) roubali Balthasar, 1935