Heterocoelia Dahlbom, 1854

Wang, Chunhong, He, Junhua & Chen, Xuexin, 2024, Revision of subfamily Mesitiinae (Hymenoptera, Bethylidae) from China, European Journal of Taxonomy 960 (1), pp. 1-61 : 5-6

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.

Figures

Fig. 2. Heterocoelia curtisulcus sp. nov., holotype, ♂ (ZJUH 958281). A. Habitus, lateral view. B. Head, antero-dorsal view. C. Antenna. D. Pronotum and mesonotum, dorsal view. E. T2, dorsal view. F. Fore wing. G. Hypopygium. H. Genitalia, dorsal view. I. Genitalia, ventral view. Scale bars: 0.20 mm.

Fig. 4. Heterocoelia punctulata (Xu, He & Terayama, 2003), holotype, ♀ (ZJUH 984787). A. Habitus, lateral view. B. Head, antero-dorsal view. C. Antenna. D. Pronotum, dorsal view. E. Mesonotum and MPC, dorsal view. F. T2, dorsal view. G. Fore wing. Scale bars: A, C–G = 0.20 mm; B = 0.15 mm.