* Arthrocnodax coryligallarum (Targioni-Tozzetti, 1887)

Material: AK, Asker: Nesøya, Vendla, 59.860466°N 10.523555°E ± 4m, 13 May 2019, L, leg. HE, coll. NHMO; Brønnøya, Sandbukta, 59.857474°N 10.529078°E ± 50m, 13 May 2019, F, leg. HE, coll. NHMO; 29 May 2019, P, leg. HE, coll. NHMO .

Biology: The larvae are predators on the gall mite Phytoptus avellanae Nalepa, 1889 (Acari: Phytoptidae), which induces bud galls on Corylus avellana ( Betulaceae). They develop in the galls of the host and pupate there in a white cocoon.

Distribution: Widespread in Europe including Norway and Denmark.