Blue-winged Ones

Zethus spinipes, I think. One of the potter and mason wasps. Note all the parts of the mouth, like little tendrils.
Isodontia philadelphica, a grass-carving wasps, also sans a common name.
Female and, with the face dot, male Four-toothed Mason Wasps (Monobia quadridens).
Nearctic Blue Mud-dauber (Chalybion californicum), presumably. Very similar looking to the Steel-blue Cricket-hunter Wasp (Chlorion aerarium).