Pebble Prominent

The wingspan is 40–45 mm. Their forewings are light grey on the front edge, the inner portion of the wing is cinnamon-brown. In the grey area is a roundish dark grey stain shaped like a pebble bounded proximally by a dark curved line. There is a dark, curved postmedian line towards the apex of the wing. The hindwings are grey, darker grey in the females. They have a dark, discal lunule. The thorax and abdomen are dark brown and thickly clothed with hair. Seitz- Basal half of forewing light yellowish brown, the central costal area white-grey in between at dark transverse line and the large arcuate black discal spot, beyond the discal spot a broad dark cloud distally bounded by a pale dentate line; in the marginal area a slightly undulate dark submarginal line (distally pale-edged and curving basad below costal margin in the shape of a black longitudinal stripe; marginal line and hind margin black. Hindwing paler or darker greyish brown. The black markings of the forewing sometimes dark brown, but never paler. Central and Northern Europe, southward to Spain, Corsica, Central Italy, northern parts of Asia Minor. Accordmg to Graeser also in Amurland. — A pale form with the ground colour of the forewing ochreous instead of brown has been obtained in Central Asia: pallida subsp. nov. (45 g). —Egg green. …