Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Genus Urophora

Unwelcome Newcomer - Urophora quadrifasciata - female Unwelcome Newcomer - Urophora quadrifasciata - male Green Eyed Fly - Urophora quadrifasciata - male knapweed seedhead fly - Urophora quadrifasciata - male Larva inside the gall - Urophora cardui Fly - Urophora cardui diptera - Urophora quadrifasciata - female Fly - Urophora affinis - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Acalyptratae")
Superfamily Tephritoidea
Family Tephritidae (Fruit Flies)
Subfamily Tephritinae
Tribe Myopitini
Genus Urophora
Explanation of Names
Urophora Robineau-Desvoidy 1830
7 introduced spp. in our area, ~60 spp. total(1)

Urophora affinis (Frauenfeld, 1857)
Urophora cardui (Linnaeus, 1758)
Urophora jaceana (Hering, 1935)
Urophora quadrifasciata (Meigen, 1826)
Urophora sirunaseva (Hering, 1938)
Urophora solstitialis (Linaeus, 1758)
Urophora stylata (Fabricius, 1775)

Urophora jaculata was introduced to California in 1990's, but did not establish.
Only one other genus in the family has vein CuA2 straight or bowed out towards the wing tip.
native to the Palaearctic (all the spp. but one occur there), introduced as weed biocontrol agents to NA(1)(2)
Life Cycle
Some (all?) spp. overwinter in galls as third instar larvae
Several spp. have been introduced as biocontrols of non-native thistles and knapweeds (including the Yellow Starthistle Gall Fly, U. sirunaseva). U. kasachstanica & U. xanthippe are planned for release in w. US to control Russian knapweed(2)(3)