San Joaquin Freshwater Marsh, Irvine, Orange County, CA. 7-21-09. © Ron Hemberger
Mason Wasp

Stenodynerus sp.

Hymenoptera: Vespidae

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San Joaquin Freshwater Marsh, Irvine, Orange County, CA. 7-21-09. © Ron Hemberger

Black Star Canyon, Orange County, CA. 9/4/10. © Peter J. Bryant

Black Star Canyon, Orange County, CA. 9/4/10. © Peter J. Bryant

Male. Fullerton Arboretum, Fullerton, Orange County, CA. 4-15-07. © Ron Hemberger

Male. Fullerton Arboretum, Fullerton, Orange County, CA. 4-15-07. © Ron Hemberger

Male. Fullerton Arboretum, Fullerton, Orange County, CA. 4-15-07. © Ron Hemberger

Male. Fullerton Arboretum, Fullerton, Orange County, CA. 4-15-07. © Ron Hemberger

Male. Fullerton Arboretum, Fullerton, Orange County, CA. 4-15-07. © Ron Hemberger