The closest I.D. I can come up with is the western tiger swallowtail (Papilio rutulus).

He was snacking on the leaves of a very large Mexican orange bush (Choisya ternata).  I wonder if he was aware of the danger that lurked less than a foot away.

Can you spot the gray paperish wasp nest in the bottom right quadrant of the photo below?

I think this (below) is the kind of wasp that was working on the nest. It looks like a sand wasp but Wikipedia says they live in burrows in the soil (sand). Would they live in a paper nest like this? Probably not, but I don’t know…. I haven’t been able to identify this insect, but it seemed to belong to this gray paper nest. Any ideas? Not a yellow jacket.