Latticed Heath Chiasmia clathrata
Wingspan 20-25 mm.
Quite a variable species, with several named forms and subspecies, and the ground colour varying from yellowish to white.
It occurs in a range of open habitats, including moorland, grassland and waste ground, and is widely distributed through most of Britain.
There are usually two generations, especially in the south, flying in May and June, and August and September, and the species flies by day as well as at night.
The larvae feed on lucerne (Medicago sativa) and clover (Trifolium).