Length c. 6 mm.  The upper surface is covered in scale-like golden or silver hairs and the tibiae have black spines; pronotum is mostly black, with the rear margin narrowly yellow. The corium is pale yellow and black, with a large paler area between the outer margins of the corium and the dark clavus.  The cuneus has an reddish mark. 

Usually found in association with bedstraws (Galium sp.) in a variety of habitats.

Adult: June to September.

A widespread but rather local species. (Note that Yorkshire population has reduced yelow markings - see https://www.britishbugs.org.uk/heteroptera/Miridae/polymerus_unifasciatus.html)

Status in Leicestershire and Rutland not known.

https://www.britishbugs.org.uk/heteroptera/Miridae/polymerus_unifasciatus.html