by Cristian Solari
Claviger longicornis (+) Parasitism (-) Lasius umbratus
Observation
Observation by Hjalte Kjærby TW @Yallevad in @inaturalist user name hjallevad
Claviger longicornis beetle parasitizing a species of Chthonolasius, most likely Lasius umbratus.
Check this link for more information.