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Paper Wasp - Polistes arizonensis - female

Paper Wasp - Polistes arizonensis - Female
Tucson (Desert Museum), Pima County, Arizona, USA
December 11, 2008
What species of paper wasp? As a twofer bonus please note the fly on the left. Diacrita costalis?

P. arizonensis.
Polistes arizonensis. Pretty common.

Thanks, Eric.

Yes, the fly is Diacrita. There are two species but I don't know how they differ.

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