Ruby-tailed wasp

Two views of a ruby-tailed wasp I found in the greenhouse. It is a parasite of solitary wasps and bees, laying its eggs in their nests.  There are several similar Chrysis species, not easy to tell apart from a photo.  The generic name comes from the Greek meaning "gold-embroidered dress".  I think this one has 13 segments to the antennae and is therefore a male.