Abstract:
The agromyzid fly Phytomyza arnicae Hering, 1925 is reported from Norway for the first time. This species is exclusively associated with Arnica montana L., where the larvae are leaf-miners. Mining larvae were collected in June–July 2011 and imagos hatched in April 2012 after hibernation. Successful hatchings where conducted from Kongsberg municipality in Buskerud (BØ) and Tokke municipality in Telemark (TEI). Further notes on distribution and biology are given. The host plant is declining almost all over its distribution area including Norway, and this may cause problems for insect species associated with the plant.
