Eriogaster arbusculae is a moth in the family Lasiocampidae first described by Christian Friedrich Freyer in 1849. It is found in parts of the Alps and mountainous areas of Fennoscandia.
The wingspan for adults is 31âÂÂ35 mm for males and 36âÂÂ43 mm for females. There is one generation per year with adults on wing from April to July.
The larvae feed on the leaves of Vaccinium myrtillus, Vaccinium uliginosum, Betula, Salix and Alnus species.