Usually found in saltmarshes around the coasts of southern and western England. Records also from Suffolk.
Similar to other Bactra, genitalia dissection may be required.
First confirmed Norfolk record at Sculthorpe Moor 11/07/09. (gen. det. male - J Clifton) Other confirmed records from Cley and Hindolveston.
Old Unconfirmed VC28 record. [JRL]
Weakly marked and unicolorous specimens can only be separated by examination of the genitalia.
Verification Grade Comment: Obscurely marked = Grade 4
Recorded in 10 (14%) of 69 10k Squares.
First Recorded in 2009.
Last Recorded in 2020.