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Photo#175775
Look like Box Elder Bugs - Boisea rubrolineata

Look like Box Elder Bugs - Boisea rubrolineata
Calistoga, Napa County, California, USA
April 6, 2008
Size: 2 cm
Found these on a table at the start of the trail to the top of Mt. Saint Helena, in Robert Louis Stevenson State Park. The other table did not have many of these bug on them but this one table had hundreds of them on it.

Yes, look to be
Boisea rubrolineata - Western Boxelder Bug, in the guide here

 
Boxelder bugs
Thanks for the reply. There were sure a lot of them in one place today.
Richard

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