On Oct 13, 2008, wallaby1 from Lincoln,
United Kingdom (Zone 8a) wrote:
Another confusing one in this Genus.
Description on the following site was the deciding factor to separate it from other species, which can vary greatly.
"forewings whitish-grey suffused with grey, brownish-grey irregularly edged markings speckled with black; hindwings brownish-grey"
Apart from the obvious grey colour, and the likeness to the pic on ukmoths.