Chrysidinae (Cuckoo Wasp)
This is, I’m pretty sure, a cuckoo wasp (family Chrysididae) in the subfamily Chrysidinae. All of the species in that sub-family have metalic green, blue, or in once case red exoskeleton. They are easy to spot but not always easy to photograph, this is pretty good but I’m still hoping for something sharper. They are not very big, only about a centimeter long, and my lens doesn’t focus any closer than a foot. Maybe it’s time I invested in a set of extension tubes. Of course, they little things don’t stop moving, either, which is a significant issue. The yellow in this picture is pollen from the yarrow (Achillea millefolium) on which the wasp is perched.