Size: 4-4.5mm
Basic colour: Head black, pronotum normally uniformally bright red-brown. Elytra black with basal third, suture and margins red brown.
Pronotoum: Transverse, sides strongly rounded and hind angles indistinct; foveae almost impunctate.
Leg colour: Brown.
Confusion species: Acupalpus flavicollis
, Confusion species: Acupalpus parvulus