Elm Sack Gall Aphid Tetraneura ulmi (Linnaeus, 1758)  

There are 3 records in the project database.

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Elm Sack Gall Aphid galls in Howard Co., Maryland (5/26/2013). Photo by Jim Brighton. (MBP list)

Elm Sack Gall Aphid in Montgomery Co., Maryland (5/7/2017). Photo by Bonnie Bell. (MBP list)

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