The wingspan is 12–14 mm. Adults are blackish, chestnut and whitish. There are two to three generations per year with the last generation of adults overwintering.[3] Meyrick- Forewings brown, mixed with whitish and more or less sprinkled with black, on
costa strigulated with black; a black inwardly oblique fascia from costa before middle, followed by a darker brown suffusion; beyond this two white dots placed longitudinally in disc, sometimes connected by a black spot; an irregular black spot on costa towards apex; four dorsal scale-teeth, first two ochreous brown, others black; dark line of cilia subfalcate at apex. Hindwings grey.
Larva yellow-whitish or green-whitish; dorsal line whiter; spots brownish; head pale brown.[4]Epermenia aequidentellus looks similar, but has narrower forewings without a hooked apex.[5]
Eggs are laid between April and September on the underside of a mature leaf of a plant from the Umbelliferae family, often near the edge.[6]
Larvae can be found from May to June and again from August to September.[7] The body sometimes appear translucent and can be glossy white, yellow or greenish, with black or brown spots and a whitish dorsal line. The head is pale brown. There are five instars.[6] Larva of Epermenia aequidentellus found on wild carrot (Daucus carota) have a dark dorsal line and a black head.[3]
Moths can be found in all months of the year. They are most abundant from October to May and in July and August.[6]
The light brown pupa is in an open network cocoon and is normally found in detritus on the ground or occasionally on the leaf, or in a petiole groove.[6]
^Meyrick, E., 1895 A Handbook of British Lepidoptera MacMillan, London pdf This article incorporates text from this source, which is in the public domain. Keys and description
^Sterling, Phil; Parsons, Mark; Lewington, Richard (2012). Field Guide to the Micromoths of Great Britain and Ireland. Gillingham, Dorset: British Wildlife Publishing. p. 201. ISBN978-0-9564902-1-6.
^ abcdGodfray, H C J; Sterling, P H (1996). Epermeniidae. In Moths and Butterflies of Great Britain and Ireland. Volume 3. Colchester: Harley Books. pp. 121–2. ISBN0-946589-56-9.
^Dr. Willem N. Ellis (2013-03-15). "Sison amomum, stone parsley". bladmineerders.nl. Dr. Willem N. Ellis, Amsterdam, the Netherlands. Retrieved 2013-03-15.