6 to 8 mm long. A. thoreyi occurs in two colour forms; puellum has the upper surface almost entirely black or dark brown or sometimes with the elytra a little lighter, thoreyi s.str. has a pale yellow to brown elytra which is generally darker along the suture. Puellum is more frequent in the north.
A wetland species often found around water margins often amongst leaf litter or vegetation.
All year round, especially in spring and summer.
Fairly frequent in England and Wales but more local in Scotland.
Fairly frequent in Leicestershire and Rutland. There were a total of 146 VC55 records for this species up to March 2015.
Leicestershire & Rutland Map
Enter a town or village to see local records
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015