Length 5 to 6 mm. A very large psyllid which is predominantly green, including the costal marginal vein. The antennae are very long (more than 2.5 x head length). The wing veins are much darker than the membrane, which has dark spinules over much of the surface. The body can develop red or brown markings in late summer. The nymphs produce white fluffy wax which can cover the animal as protection.

Detailed examination of the specimen is needed to identify the species.

On Alder.

Late spring and summer.

Associated with Alder.

Common and widespread in Britain.

Frequent in Leicestershire and Rutland.