Horned Oak Gall Wasp Callirhytis cornigera (Osten Sacken, 1865)  

There are 12 records in the project database.

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The gall of a Horned Oak Gall Wasp in Frederick Co., Maryland (6/8/2013). Photo by Jim Brighton. (MBP list)

A Horned Oak Gall Wasp in Howard Co., Maryland (5/27/2017). Photo by Joanne Solem. (MBP list)

Horned Oak Gall Wasp gall on Willow Oak in Anne Arundel Co., Maryland (2/11/2018). Verified by Charley Eiseman/BugGuide. Photo by Bill Hubick. (MBP list)

Galls of Horned Oak Gall Wasps on Shingle Oak (Quercus imbricaria) in Montgomery Co., Maryland (4/9/2015). Photo by Jane Hill. (MBP list)

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