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Photo#1563535
Prionus species - Prionus - male

Prionus species - Prionus - Male
6 miles NW Lyons, Boulder County, Colorado, USA
July 27, 2013
Seen in the CO foothills at ~6400' elevation. I think this is a Prionus. Antennae indicate male. There are several species listed for Colorado. Any help is much appreciated.