Interrupted Spider Wasp

This wasp mimics paper wasps of the genus Polistes. It is carrying a Golden Silk Spider, Trichoniphila clavipes. The same species of spider shown in the link.
When I saw this wasp I thought it was a member of the Polistes colony that was above my head. I thought how is this wasp going to get this large prey up to that nest . I also couldn't recall Polistes preying on spiders. It couldn't be Polistes but it looked exactly like the wasps above.