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.