5.5 mm. Found in car while parked for a pit stop at the Wawa convenience store after a trip around the landfill (grassland, adjacent salt marsh, and of course garbage). No longer unIDed; many thanks to Charlie@LincsBeetles for the genus ID. O. melanopus looks like the only only on BugGuide that's in range & matches in appearance. It feeds on grasses, so landfill habitat makes sense. Nonnative, a pest of crops.
Summary[edit] Description: English: Oulema melanopus (Linnæus, 1758). Germany: Hessen, Kreis Fulda, near Michelsrombach. Date: 26 July 2015. Source: Own work. Author: Francisco Welter-Schultes. Camera location50° 39′ 37.71″ N, 9° 39′ 10.11″ EView all coordinates using: OpenStreetMap 50.660474; 9.652808.