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Prokelisia marginata
Family: Delphacidae

 This delphacid is native to the USA where it is found in saltmarshes, feeding on Spartina alterniflora. It has recently been introduced to Britain and was first recorded in 2008 from the Hampshire coast in association with the closely related common cord-grass Spartina anglica.

It has colonised suitable habitat along the south and south-east coasts of Britain with extreme rapidity and can reach very high densities.

Adult: ?May to October
Length 3-4 mm
 Prokelisia marginata
Adult: Dorset (September 2009) ©Mark Dunkling
Prokelisia marginata Prokelisia marginata
Adult: Dorset (September 2009) ©Mark Dunkling

 Adult: Dorset (September 2009) ©Mark Dunkling