Morley’s Final Catalogue: Everywhere among millefoil. Ipswich electric lights (Pyett), Foxhall, in Monks Soham fly-trap in 1915, Southwold Somerleyton brick-field. Mildenhall (Mly), Brandon, Tuddenham and common on the Breck at Icklingham in August 1934
Recent Status: Currently a rare species in Suffolk.
Life Style: A single brooded species that comes to light flying from May till August. The larvae feed on the lower stem and rootstock of Achillea millefolium. They hibernate and pupate in the larval habitation.
Identification: A superficially plain species however this is a result of the deep ochre tipped brown scales over the entire wing that result in transverse striations basally. Paler markings are of white and there are black spots on the termen and broad plumbeous striae from the costa. The cilia are silver and grey. The male has a costal fold to one half. More Info
Determination by Genitalia Examination (gen. det.) Required
Recorded in 5 (9%) of 58 10k Squares. First Recorded in 1915. Last Recorded in 2020. Additional Stats