Sunol Regional Park, Alameda County, California, USA Size: 2mm
These wasps emerged from these Dryocosmus dubiosus galls. They are not cynipids but parasitoids. They emerged on 12/19/2007, but they've been inside my heated house so I'm not sure that these are good dates for when they would emerge outdoors.
Contributed by Joyce Gross on 23 December, 2007 - 2:44am Last updated 21 February, 2018 - 6:09pm
Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.