Identification: Frons - (dorsal surface of head) black with triangular yellow (a yellow which may be darkened to a dark brown) markings extending posteriorly from a wide base at the level of the antennae to an apex just short of the ocellar triangle, these triangular markings do not meet the eye margins.
Head profile - black in the top half, yellow in the lower half.
Face (below antennae) - Mainly yellow with black extending down as diffuse stripes along the margins of the eyes, ending at the lowest point of the eye; a broad brown central band.
Humeri - yellow (may have an infusion of black in some specimens - Scotland)
Chandler, 1975: "I have now on several occasions swept this species in numbers from pure stands of the wood-rush Luzula sylvatica and believe that there is a specific association with this plant."