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The two UK Xanthodelphax species are distinctive for being entirely yellow-orange (often bright yellow), and are separated by microscopic examination; the differences are quite striking, however, and live specimens can be identified in the field with a 20x lens.
X. flaveola has normal parameres, and the gonoplacs are short and convex. Both macropters and brachypters occur.
Historically scarce with no recent records in the known range of southeast England, but new populations have recently been found in Wales and Shropshire. Feeds on Poa pratensis in generally dry areas; intolerant of mowing.
Adult: June to September
Length 2-3 mm (macropters ~4 mm)
male: Powys (June 2013) ©Joe
female: Powys (June
Powys (June 2013) ©Joe
|Adult female macropter: Powys (June 2013) ©Joe Botting|