Moved from Blue-Black Spider Wasps.

At first I noticed two things about this wasp. If you look at the pygidium VERY closely you can see a few really strong bristles that are pointing backward...Anoplius. Now to narrow it down to subgenus by elimination. Marked with orange: not Anoplius (s.s.), Notiochares, or Anopliodes since all known species of those subgenera are black. That means it has to be either in the subgenus Pompilinus or Arachnophroctonus. Without wing veins that is a tough task. I can give two pieces of supporting evidence on what I think is a very solid ID. It has a lot of silvery pubescence (notice the face and legs) and it is found on a BEACH that has soil in particles you can make out, which is about as loose as you can get. This I think is Anoplius semirufus, which is in a species group that contains two species that are marked with orange that are very attached to loose soil, especially beaches. The only character I could use to separate these two species (the other is A. apiculatus) is the VERY shiny abdomen of A. semirufus.

Definitely a spider wasp, possibly an Arachnospila sp.