Morley's Final Catalogue: [Kent to Devon; & Central Europe to Japan].
Aston's Additions: First Suffolk capture was made by Mr. Chipperfield at Knodishall on 1.viii.1948 (Trans. S.N.S., Vol. VI, part III, p. 243) and it is now known from Easton Broad, Reydon, Walberswick and Aldeburgh. It has extended its ''Kent to Devon'' (Morley, 1937) range.
Recent status: Common along the coast and Sandlings, largely absent from high Suffolk and scarce in the west of the county.
Identification: Compare with Scarce Black Arches.
Recorded in 29 (50%) of 58 10k Squares. First Recorded in 1948. Last Recorded in 2021. Additional Stats