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Unknown Bug - Epicauta pardalis

Unknown Bug - Epicauta pardalis
Whetstone, Cochise County, Arizona, USA
June 28, 2010
Size: 1/2" long, 1/8" wide
These bugs look to be a type of beetle. They have a soft shell and fly. They were found around one mesquite tree, probably around 1,000 in number. I did not see them eating anything.

Moved from ID Request. Possibly frass due to fuzzy image, but few images in BG...

Wait for a beetle expert, but
take a look at Epicauta pardalis:

Welcome to BugGuide!

yes indeed, pardalis or closest kin

J.D. Pinto says, "probably Epicauta pardalis.
"...Unable to discount E. andersoni however."

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