This moth has a distinctive row of blue-centred black dots on the hindwing. The male is slightly smaller and whiter than the female.

Coastal areas, river valleys and wetland areas.

Recorded in 87 (32.2%) of the 270 2km squares of Huntingdonshire.

Last recorded in September 2019

Recorded date range (Adult): 04 May to 26 September

Recorded date range (Larva/Leafmine): 26 June to 26 June