Conisternum obscurum (Fallén, 1819)

A small greyish species with a reddish frons and face. Legs reddish yellow. Halteres yellow. Wings clear with yellow veins. Palps rather long, somewhat flattened and yellow. Antennae with second segment pale, but otherwise dark. Wing length: ♂ 4.1 - 5.0 - 6.0 mm (6); ♀ 4.1 - 4.2 - 4.3 mm (5).