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Dicyphus epilobii
Family: Miridae

Members of this genus can be difficult to identify using structural features, but general coloration and hostplant are often informative.

This species is uniformly pale green, with the exception of the red 1st antennal segment. It can resemble pale forms of D. errans, which can show a red 1st antennal segment, but the mesopleura are entirely pale (dark in D. errans).
Adults are always macropterous.

Abundant throughout 
Britain on Hairy Willowherb Epilobium hirsutum and sometimes various other herbaceous plants. 

Compare: D. errans

Adult: mainly July-October
Length 4-5 mm
Dicyphus epilobii
Adult: Berks (September 2008) ©Jonathan Michaelson

Dicyphus epilobii Dicyphus epilobii
Adult: Dorset (July 2010) ©Tristan Bantock

Detail showing pale meospleuron (arrowed) ©Stuart Foster