What’s That Bug?

If nobody here ID’s it, I’ll actually post it to What’s That Bug… but I figure someone in my LJ friends might know!

We live by a creek.  It didn’t seem to like being out on the concrete; it ran and hid in the mulch as quickly as it could.  It’s about an inch long, and sturdily built; it has a very unusual combination of features: wasp-like glossy black wings, muscular thick body, big head.  Back of the abdomen almost reminds me of a moth.

ETA: The first shot, with the contrast blown out. This is NOT a moth.

Another edit: the folks at BugGuide.net ID’d it… it’s a Rove Beetle, something in genus Platydracus. They’re an insectivore, so I’m glad I left it be!