Key to the Chinese species of the genus Heterocoelia Dahlbom, 1854

1. Male: flagellomeres not thickened, at least 1.50 × as long as wide (Fig. 2C) ................................... 2

– Female: antenna usually thickened and shorter (Fig. 4C) ................................................................ 3

2. Mesoscutum with median mesonotal sulcus on apical half ............................ H. curtisulcus sp. nov.

– Mesoscutum without median mesonotal sulcus ................................................................................. ..................................................................... H. neomoczari (Barbosa & Azevedo, 2018) comb. nov.

3. PPP with apical margin acute in lateral view; T4–5 entirely yellowish brown .................................. ...................................................................... H. punctulata (Xu, He & Terayama, 2003) comb. nov.

– PPP with apical margin truncate in lateral view; T4–5 mostly dark brown ..................................... 4

4. Legs reddish brown ............................................................................................. H. unicolor sp. nov.

– Legs dark brown, tibiae basally and tarsi yellowish brown .............................................................. 5

5. Distance between 1 st and 2 nd hamuli 2.0× distance between 2 nd and 3 rd hamuli of hind wing; apex of PPP rounded in lateral view .................................................................................. H. remota sp. nov.

– Distance between 1 st and 2 nd hamuli equal to distance between 2 nd and 3 rd hamuli of hind wing; apex of PPP truncate in lateral view ........................................................................... H. varicolor sp. nov.