Beetles from old forest (Quercus robur) at Larvik

Sampling was carried out on 40 oaks (Quercus robur) in the vicinity of Larvik municipality in southern Norway. Sampling was conducted with flight intercept traps: 20x40cm windows with a funnel below leading to a vial containing ethylene glycol, water (4:1 mixture) and a drop of detergent used as a surfactant. Each tree was sampled with one trap hanging in the canopy. Traps were activated in May and emptied once a month until the end of August in 2017 and 2018. All beetles were identified to the species level following the taxonomy of The Norwegian Biodiversity Information Centre (http://doi.org/10.15468/4dd3tf).