Up to 30mm. This species has ridges and dimples on its elytra and also has a pronotum that is barely transverse and with contracted sides.
C. violaceus has smoother elytra that are more elongate and also has a more transverse pronotum.
Although predominantly a woodland and heathland species, it can occasionally be found in gardens and is a useful natural pest controller.
Mainly seen in summer months
They are nocturnal hunters, hiding under logs and stones during the day.
Although widespread throughout Britain, C. problematicus is a local species and is uncommon in many areas.
Now local and uncommon in Leicestershire and Rutland and largely restricted to Charnwood.
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