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Photo#67283
Mischocyttarus flavitarsis in search of caterpillars - Mischocyttarus flavitarsis - female

Mischocyttarus flavitarsis in search of caterpillars - Mischocyttarus flavitarsis - Female
Mission Canyon, Santa Barbara, Santa Barbara County, California, USA
July 28, 2006
Thanks folks!!

Actually...
this is not Polistes. The abdomen is slender and petiolate, which means it's a Polybiine Paper Wasp. They used to be considered a separate subfamily, but I think they are now classified within the Polistinae (Polybiini?). This is probably Mischocyttarus, and it might be M. mexicanus, but this is not my specialty group so you'll have to wait for confirmation at the genus level from someone else.

 
Mischocyttarus flavitarsis - female
Is the only one species of the West, from British Columbia southwards. Polybiini no longer exists even as a tribe name. Dependant founding Polistinae of Neotropical region are now classified in the tribe Epiponini of the Polistinae subfamily. Polybia belongs to this tribe, but not Mischocyttarus which is considered as a tribe of its own, just like Polistes.

 
Thanks Richard
I'm not up-to-date on my Vespid taxonomy...I guess you learn something new every day. I hadn't seen a reference to Polybiini in a long time time so it made me wonder if there were some changes.

 
Thanks for the ID
Thanks! You'd think if there were only one, I could know at least one :-) There's quite a bit of variablity in these wasps through the season. Of course, size, but also pattern. I've updated my original post with the corrected name.

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