Broad wings and thin abdomen almost made it look like a Calopterygid jewelwing damselfly!
Posted on BugGuide too, but no responses yet: http://bugguide.net/node/view/1080670
1.5 inch black wasp with yellow antenna and laterally compressed abdomen.
Slowly hovering around the ferns. Abdomen very narrow, not really sure it's a pompilid or not.
Photo taken at night with flash and a flashlight...this guy was hanging out on the trim of the sliding glass door...a popular hangout for bugs and treefrogs. Ided to species level by Bob Carlson at BugGuide.