Length 3 to 4 mm. The four bugs in this genus are distinctively shaped and have a highly punctured body and forewings. However, they can be difficult to separate. C. melanocephalus lacks a pale central keel on the scutellum and the wings are punctured throughout.

Detailed examination of the specimen is needed to identify the species (a photograph alone is not normally sufficient because key features are too small or hidden).

Detailed examination of the specimen is needed to identify the species.

Host plants include trefoils, loosestrifes and rushes.

Adult: All year

This species is quite common in southern England in damp areas.

Occasional in Leicestershire and Rutland.