Mesosoma, lateral view (arrow indicating mesopleuron): 19 O. aeneus ♀. Pronotum and mesoscutum, dorsal view: 20 Omalus biaccinctus ♀ 22 O. aeneus ♀ 24 O. puncticollis ♀. T3, postero-dorsal view: 21 O. biaccinctus ♀ 23 O. aeneus ♀ 25 O. puncticollis ♀. Scale 1 mm.

 
 
  Part of: Paukkunen J, Berg A, Soon V, Ødegaard F, Rosa P (2015) An illustrated key to the cuckoo wasps (Hymenoptera, Chrysididae) of the Nordic and Baltic countries, with description of a new species. ZooKeys 548: 1-116. https://doi.org/10.3897/zookeys.548.6164