Well, I can't literally catch them for you @Redmont, but seeing that you live in Nebraska....
Bugguide states nitida lives in Nebraska on the info page, but it also says NE is the edge of its range.
Have you ever seen wild Cotinis flying over your head and around you? If so, see this if you haven't already.
I can offer you some more advice on bagging one in the wild, if that isn't enough. Cotinis mutabilis is quite common in CA around my yard and is nearly identical.