Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Photo#214083
Pelidnota punctata? - Pelidnota punctata

Pelidnota punctata? - Pelidnota punctata
College Park, Prince George's County, Maryland, USA
August 14, 2008
Size: ~25 mm
Found on a sidewalk next to a grassy strip along a wooded lot. Kept opening its wings, but was unable to fly. Tentatively identified as the grapevine beetle, Pelidnota punctata.

I agree
see guide.