The Latticed Heath (Chiasmia clathrata) is quite a variable species (wingspan: 20-25 mm), 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 western Holland.

In my yard, Hilversum, The Netherlands, 18 July 2013