Morley’s Final Catalogue: Not found since the larvae were discovered on Eupatorium at Blaxhall before 1890 (G. A. Harker of Liverpool).
Recent Status: Locally common at wetland sites with Eupatorium Hemp Agrimony.
Life Style: The moth is double brooded. The moth comes to light and can be found during the summer..
Identification: Suffolk’s smallest plume moth is usually pale but can be a light brown colour. It has a dot at the cleft and an elongate one on the costa, other spots may be present in well-marked specimens. The termen and dorsum scale fringes of the first lobe of the forewing are both brown. There is usually a yellow tinge around the saddle (posterior of thorax-anterior of abdomen).
The larvae feed by mining into the stem and often producing a stem gall. They overwinter as a fully grown larva in the stem of the foodplant. They can be found in Eupatoruim by searching for entrance holes showing frass.
Recorded in 31 (53%) of 58 10k Squares.
First Recorded in 1987.
Last Recorded in 2019.