This fly was introduced to Australia for biological control of Spear Thistle.
Classification
from Australian Faunal Directory
Order Diptera - Flies, 8955 named species in Australia at Nov. 2021
Division Cyclorrhapha - Flies having Short Antennae with a Bristle or Arista
Family Tephritidae - Fruit Flies, 293 named species in Australia
Genus Urophora
Species Urophora stylata