[1][2][3][4][5] For terminology Speight key to genera and glossary Length 10–13.5 mm (0.39–0.53 in) The face is orange-yellow, with a median black stripe that reaches almost to the antennae.

The face profile is moderately excavated on the upper two-thirds, and slightly retreating on the lower portion.

The female frons is somewhat narrowed above, with black pile only on the upper half, and is rarely almost to the antennae.

The antennae are black and the third joint (flagellum) is largely or almost wholly red, with the upper and apical margins brown.

The abdomen of the female has four pairs of yellow spots, which are more transverse than the ones in the male.

The basal corners of the fifth segment have transverse, pollinose triangles that are narrowly separated in the middle in females.

The black on the base is rather rounded laterally and broadly separated from the side margins.

The base of the third segment has a rather broad, sub-oval spot on either side, and the fourth segment has a broad, slightly lunulate yellow pollinose spot on either side sub-basally.