Argent and sable moths or Rheumaptera hastata are day flying moths of the Geometridae family, with distinctive black and white colourings. They tend to live on wetlands and hillsides. The larvae spin together the leaves of their food plants (such as birch and bog myrtle) to form their cocoons. It was named argent and sable in 1778. Argent and sable refers to the heraldic color names for black and white. Their distribution is Holarctic.