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Photo#143137
Red and Yellow Wasp - Polistes aurifer

Red and Yellow Wasp - Polistes aurifer
Moab, Grand County, Utah, USA
September 2, 2007
Size: ~25-30mm
This wasp was never found far from streams; I found them at Pack Creek and Mill Creek. At Pack Creek they were rotating in shifts through a sunflower patch with three other species of wasps. It looked like they were hunting for the last spiders of Autumn before it turns cold.

Moved
Moved from Polistes.

Polistes aurifer, female (UT)
P. aurifer is correct. P. apachus has yellow stripes on the scutum and a large yellow spot on each side of the pronotum, P. flavus is even more yellow and P. dorsalis has a different pattern on tergum 2 (red area is more or less rectangular). None of these three have been recorded from Utah to my knowledge.

paper wasp
in the genus polistes, dont know the exact species, though.

 
I think it might be
P. apachus or possibly P. flavus, though I could be totally wrong. I'm sure one of our experts here will know for sure, though.

 
Not P. flavus.
The western Polistes species are really tough. I would offer P. aurifer as a possibility for this specimen, but I think it would take running it through a key to be definitive. You really can't go by color pattern alone.

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