This kind of comment should be in the information page, otherwise it gets lost. You made similar comments in postings of other species of this genus, all of them should be copied to the corresponding info page. also if you have any additonal information it is important that you add it.

That was the only wasp present at the time.
I saw the fourth one (single cell), but it did not have an egg in it.

differnt color nest will signal a different species in Polistes? Or is is just whatever they find? I was curious because In my backyard I have about three different types (that clearly look like different species) and they each have a different color nest... hmmm.. just curious

Charles

the answer is no clear-cut "Yes" or "No". One the one hand, some species tend to choose different proportions of different building materials (either rotten wood, sound dry wood, or dry sticks of herbaceous large weeds), hence often recognizable nest colors. Quite logically, forest species tend to rely on rotten wood while species of open meadows use rather dry weeds.
On the other hand, most Paper wasps are fairly flexible. One cannot say they use "whatever they found", but nonetheless they will switch from their usual building source if this latter is scarce, and conversely use new ones, sometimes quite unusual such as colored paper or cardboard.
By the way, this one wasp is no Polistes, but a female Mischocyttarus sp. (interestingly, it looks different from usual M. mexicanus). Anyway, building habits are basically the same.