Thaumatomyia notata, the 'Yellow Swarming Fly', is a species of 'frit flies' or 'grass flies' belonging to the family Chloropidae subfamily Chloropinae. This species is present in most of Europe, in the Afro-tropical ecozone, in the Near East, in North Africa and in the Oriental ecozone. The adults grow up to 3 millimetres (0.12 in) long. The thorax and the eyes margins are bright yellow, mesonotum shows brown longitudinal bands and yellow stripes, the abdomen is yellow with large horizontal brown stripes.