Morley’s Final Catalogue: Somewhat local among Achillea ptarmica, L., all over the County. Assington Thicks and Ipswich (Mlv); Hemley (Wir) and Orford (Gibbs) in 1903 (EMM. 1904, 80);' not uncommon at Aldeburgh in 1892 and Southwold in 1897 (Ctw); Yoxford and elsewhere inland (Pyett); Kessingland and Lowestoft (Ctw), north denes at Gunton in 1898 (Mly). Brandon (South, Barrett).
Recent Status: The species is common on the lighter land areas of Suffolk.
Life Style: A single brooded mid-summer flying species. The larvae feed on Achillea millefolium, A. ptarmica and occasionally Tanacetum vulgare. They mine stems and hibernate in a stem before mining a number of young stems in spring. They pupate head down on a stem of the foodplant.
Identification: A cream or light ochre forewing with extensive darker ochre shading. The scale tooth on the third lobe of the hindwing is absent or represented by a row of short dark scales. The species has a uniformly darkened tibia between the two pairs of spurs.
Recorded in 27 (47%) of 58 10k Squares. First Recorded in 1892. Last Recorded in 2020. Additional Stats