Delphax pulchellus

Males 5mm, females 8mm. Brachypterous and macropterous forms occur. Males are distinctively pigmented, females brown and could be confused with Asiraca clavicornis, but in this species the anterior tibiae are not flattened. The frons is mostly brown, with some pale spots, often dark-bordered; these are sometimes aligned to form a band. 

Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.

Found in reedbeds (Phragmites). 

All year. 

Scattered distribution in suitable habitat in southern England and Wales.

Rare.

https://www.britishbugs.org.uk/homoptera/Delphacidae/Delphax_pulchellus.html