Length: 1.6-2mm. Basic colour: brown. Pattern: a broad dark brown to black strip running along the centre line, widening at the top and bottom. Number of spots: 0. Pronotum: dark brown to black. Head colour: dark brown to black. Leg colour: brown, although variable. Other features: hairy.
Habitats: deciduous trees in marshy habitats. Host plants: willows and poplars. Food: aphids and scale insects. Overwintering sites: bark crevices and under the bark of willows and poplars.