Ringed China-mark Parapoynx stratiotata
Wingspan 15-28 mm.
Although there are many variations of ground colour, this species is readily recognised by the dark ring with whitish centre on the forewing.
The larva is an aquatic feeder, living on pondweeds and other aquatic plants.
It is found locally in suitable habitat mainly in the southern half of Britain, and flies from June to August, being attracted to light.