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Photo#1889192
wasp, stealing mud? from Trypoxylon nest - Auplopus - female

wasp, stealing mud? from Trypoxylon nest - Auplopus - Female
Austin, Travis County, Texas, USA
June 7, 2020

Images of this individual: tag all
wasp, stealing mud? from Trypoxylon nest - Auplopus - female wasp, stealing mud? from Trypoxylon nest - Auplopus - female wasp, stealing mud? from Trypoxylon nest - Auplopus - female wasp, stealing mud? from Trypoxylon nest - Auplopus - female

Moved
Moved from Spider Wasps.

Moved
Moved from Aculeata - Ants, Bees and Stinging Wasps.

The pronotum is rather flat. (not knobby)
She could be something in Auplopus, but I'm not sure. The wing-vein pattern looks close.
Please compare: Other people know this genus much better then I do, sorry!

Moved
Moved from ID Request.

Looks like a Pompilid to me--but I'm not certain. Best to get it out of ID Request, though, to give the experts a chance to see it.

 
Thank you, Ken!
Now I understand that she was not parasitising the nest -- I misinterpreted her behaviour.

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Did I miss something? :) Do you have any idea who this wasp might be?

 
Post
I posted this morning saying it's probably C. californicum (known to steal the nests of Trypoxylon), but the wings look wrong.

I also get strong spider wasp "vibes" from it (something like this?) but that doesn't seem right either. I think Bob B. told me that the pronotum of spider wasps never look like that (kinda upturned at the front).

So I'm really not sure. Hopefully someone will come along and tell us what it is!

 
Thank you!
Yes, I think this guy (gal) is quite a bit smaller than C. californicum. I didn't measure the wasp, but the diameter of the nest she's on here is 5 mm. Also, her behaviour is unique: she's quite squirrelly in her flight, bouncing back and forth for quite some time before landing on a nest.

I have an abundance of Trypoxylon wasps who rented out about half of the apartments in my bee houses. They work in pairs, usually, and communicate with loud buzzes from inside and outside the nests. When they are working inside the nests, they make quite a bit of noise. There's no shortage of spiders in my yard, especially Mecaphesa, but I don't know what species/genera they are actually using.


UPDATE: My bad, Nathaniel Green -- so sorry !! Bob says she was probably just looking for spiders, not laying eggs in another's nest.
Now that I know what she is, I don't think these guys would use a bee house to nest.
I'm looking at more photos and now I think she was stealing mud from the Trypoxylon nests.

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