Wingspan 9 to12 mm. Another of the longhorn moths, this species can be identified by the combination of the brassy green forewings and what has been described as an orange collar or yellow crown. As with the other moths of the genus, the antennae are of exceptional size, up to twice the length of the forewing in the male and one and a half times in the female.

Flower Meadows and verges visiting flowers of the foodplants, Cuckoo Flower or Garlic Mustard.

The single generation flies in May and June.

Fairly common throughout the Southern half of Britain. In the Butterfly Conservation's Microlepidoptera Report 2011 this species was classified as common.. 
 

Occasional or little recorded in Leicestershire & Rutland. L&R Moth Group status = C (very scarce resident or rare migrant)