I don't know what this blue flower is. Anybody?

[It's a (Great) Blue Lobelia, Lobelia siphilitica. I knew the 'W's would come through! Thanks, DW and OW. I've also learned this is a close relative of the cardinal flower.]























Yikes! This is a thread-waisted wasp checking out some boneset:




These wasps prey on caterpillars, stinging them and lugging them back to their underground nests to feed their young. This guy had better watch out:



I found one more interesting thing on my way home from the site: