Although apparently no longer qualifying for Nationally Scarce status, this species has a very patchy distribution nationally. The localised populations on well-drained calcareous terrain in west Oxfordshire and northwest Berkshire are at the edge of a wider stronghold area extending through Gloucestershire and into Dorset. Those in the far north of Buckinghamshire are the western extent of another stronghold extending through Bedfordshire into East Anglia.
Recorded in 18 (23%) of 78 10k Squares. First Recorded in 1750. Last Recorded in 2022. (Data up to end 2022) Additional Stats