Gary J. Toth wrote:

I'm gettin Corn Beetles on my roses -- small beetles, medium green
with a few black spots.

Are these good guys or bad guys? I mean, are they predatory to bad
guys (spider mites, aphids, etc) or are they in cahoots with 'em?

Are you sure they aren't baby lady bugs? This is what they look
like in my garden. (Not that I have any idea of
when babies appear in your area.) Where are you and why
do you think they are corn beetles? What IS a corn beetle,
anyway, and if it eats corn why would it eat insects? Inquiring minds!