Acupalpus dubius

2.5 - 3mm. A small, dark brown (almost black) ground beetle with the pronotum a lighter brown. The antennae are dark but with a paler first segment. The legs are yellow-brown. The pronotum narrows towards the base and has very rounded hind angles. There is a dorsal puncture on the third elytral interval.

Bembidion species have a much reduced last segment to the maxillary palps.

• 2.5-3mm
• dark brown-black with the pronotum pale grown
• antennae dark except for the pale first segment
• legs are yellow to pale brown
• the pronotum is widest in front of the middle, then narrows with straight sides to the rounded hind angles
• the pronotal foviae are largely unpunctured
• has a dorsal pore in the third elytral interval

Wetland areas, often in moss and grass tussocks.

March - October

Common and widespread in England and Wales up to the midlands.

Reasonably common.