Endothenia marginana, the downland marble, is a moth of the family Tortricidae.

[3] The male can be identified by the white hind wings, but the female is difficult to determine based on its external appearance alone.

The forewings pattern is dark brown, grey, black and white.

In the outer part there is an irregular white cross-band that is often interrupted in the middle.

The male's hind wings are characteristically silky white with brown dusting in the outer part, while the female has brown hind wings like most other Endothenia species.