Key to the genera of pollen wasps from Central Asia

1. Propodeum with wide lateral lamella separated from lateral apex of postero-lateral process of propodeum by distinct emargination; metasoma with sharply produced lateral margins of terga forming more or less developed teeth; metasomal sterna rather flat; antennal scape less than 1.5 times longer than pedicel; forewing can be folded longitudinally in rest and in death................................................................................. Celonites Latreille, 1802

- Propodeum without such lateral lamella; metasoma with lateral margins of terga not produced; metasomal sterna convex; antennal scape usually at least 1.5 times longer than pedicel; forewing variable.................................... 2

2. Large species (total body length 10–17 mm); forewing not folded longitudinally in rest and in death; larger spur of hind tibia branched; male antenna elongate, reaching approximately metasomal tergum III, articles 8–12 fused (Fig. 12E, G); at least metasomal sternum III of male with ventral projection (Fig. 12C, D); tergum VII of male with semi-circular apical emargination between rather acute lobes (Fig. 12F, H)................................................ Masaris Fabricius, 1793

- Small species (total body length 2–7 mm); forewing can be folded longitudinally in rest and in death; larger spur of hind tibia simple; male antenna short, reaching at most coxae of forelegs, antennal articles 8–12 not fused (Figs 1D, 4B, 5D, 6D, 9B, 13F); metasomal sterna II–IV of male not modified (Figs 1B, 4D, 5B, 6B, 9D); tergum VII of male with slit-like apical emargination between rounded lobes (Figs 1E, 4C, 5C, 6C, 9C).......................................... Quartinia André, 1884