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

Calendar
Upcoming Events

Interested in a 2022 BugGuide gathering in New Mexico?

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

National Moth Week 2020 photos of insects and people.

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

Discussion, 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

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Previous events


TaxonomyBrowseInfoImagesLinksBooksData
Photo#265144
Goldenrod Round Gall Fly (goldenrod fauna) - Eurosta solidaginis

Goldenrod Round Gall Fly (goldenrod fauna) - Eurosta solidaginis
Horsham, Montgomery County, Pennsylvania, USA
Size: 6-7 mm.
It hatched from a goldenrod gall that I kept indoors, so I am not putting the date (April 10 or 11) in the field above. Ordinarily they emerge in May or June. I have a few other galls outdoors so I may add other images later. If I am lucky I may find some of the fly parasites, too.
I think that it is a male but I am not sure.
Size from head to abdominal tip: 6-7 mm.


Larva, inside gall           Emerging adult            Galls

These are different individuals, added here for the purpose of illustrating the life cycle.

More on Goldenrod Gall Fauna

Southeastern PA

Higher res. image