I think this is Tomocerus minor. The antennae look like a description I saw somewhere in here by Frans Janssens, if I understand the description. At least one of the antennae looks to have an annulated third segment. I'm assuming it is immature because Dr. Janssens says the adults are bluish.

It was sitting on the siding of our workshop. Must have recently come up from the ground around and under the shop (it's a pole barn).