Flew onto a tree-trunk of a Boxelder, Acer negundo, where a line of ants was active. Remained for a minute or so, then flew off. I thought it was a Trichiotinus or Euphoria at first. I was quite thrilled to see this species--I've seen most of the large, diurnal scarabs in my area. (Update January 2010. Still my only sighting of this species!)

See guide page for identification references.
Image updated 4/16/2020. I increased brightness and saturation quite a bit, as the original was very low contrast and saturation--I am not sure why.