Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Interactive image map to choose major taxa 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

National Moth Week was July 19-27, and the Summer 2025 gathering in Louisiana, July 19-27

Photos of insects and people from the 2024 BugGuide gathering in Idaho July 24-27

Moth submissions from National Moth Week 2024

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

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


Photo#145075
Crystalline Gall Wasp - Feron crystallinum - female

Crystalline Gall Wasp - Feron crystallinum - Female
Sunol Regional Park, Sunol, Alameda County, California, USA
October 7, 2006
Size: 25mm longest length
A small mass of Andricus crystallinus galls on Quercus douglasii (blue oak).
Also on this leaf are two other species of cynipid galls:
Andricus atrimentus (Striped Volcano Gall Wasp) and Liodora pattersonae (Plate Gall Wasp)