Urophora quadrifasciata - A fly of species <i><a href="//commons.wikimedia.org/w/index.php?title=Urophora_quadrifasciata&action=edit&redlink=1" class="new" title="Urophora quadrifasciata (page does not exist)">Urophora quadrifasciata</a></i> (Diptera: Tephritidae) on knapweed. © TristramBrelstaff - CC BY-SA 3.0 - Wikimedia Commons
Mas Larrieu