Length: 3-4mm. Basic colour: black. Pattern: two small orangey-red spots near tips of elytra. Number of spots: 2. Pronotum: black with orangey-red lateral and, often, anterior margins. Head colour: black and red. Leg colour: black and brown. Other features: hairless; mouthparts and antennae brown.
Habitats: costal or wet habitats. Host plants: low vegetation at water margins, Reed and Reedmace. Food: scale insects and aphids. Overwintering sites: leaf litter and moss.