Hydromyza livens (Fabricius, 1794)

An elongate, dark coloured fly with very reduced head and thoracic bristles. The ocellar bristles are absent and the frontal orbitals are very short. Frons reddish, face jowls and palps yellow. Thorax and abdomen dark grey. Thorax with two brownish stripes along the lines of the very short dorsocentrals. Femora dark, but with yellow tips and tibia also dark with yellow knees and apexes. Tarsi dark, halteres and wing veins all dark. Wing length: ♂ 6.5 - 6.6 - 6.8 mm (2); ♀ 6.7 mm (1).