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Photo#531761
Sphecid nest? - Sceliphron caementarium

Sphecid nest? - Sceliphron caementarium
Hancock County, Indiana, USA
June 19, 2011
Upon return from vacation, a wasp had built a mud nest on the floor of the garage. I saved what was left after it was run over. There are several larva and/or eggs, and one of the larvae seems to have a parasitoid on it. The cells were elongate, about an inch long (just a guess from memory). There were three cells and most of the entombed spiders are visible here. Some are still visibly twitching.

Would this have been a sphecid nest, or are there other wasps that provision with spiders? What might the parasitoid be? Will the parasitoid develop if I place it, a larvae or two of the wasp, and some spiders in a small closed container?

To our spider enthusiasts, if you'd like to see a close-up of any of the spiders let me know.

These images can be frassed if not needed.

Images of this individual: tag all
Sphecid nest? - Sceliphron caementarium Sphecid nest? - Sceliphron caementarium Sphecid nest? - Sceliphron caementarium

Moved
Moved from ID Request.
I think this one is a good illustration of the contents of the nest. If the parasite develops into an adult, I think the rest of the images should be moved to whatever species it turns out to be.

 
Larva expired
It started to pupate but didn't make it.

Sceliphron caementarium
Should we move all these to Sceliphron caementarium?

 
We can
I wasn't really sure where to put it, or whether it had any value to the guide.

Sceliphron caementarium
I agree with Lynette on the nest ID--inch-long cells sound good for this species. Pompilid spider wasps only put one spider in each cell, and Trypoxylon politum make distinctive, long, multicelled tubes.

 
Yes
Thanks Charley. I actually saw a Sceliphron caementarium buzzing around in the garage yesterday.

spiders in wasp nest
In Thompson Falls, MT I'd guess it was the Black and Yellow Mud Dauber (Sceliphron caementarium), I'm not sure about your area.

Great collection of spiders. Here are my guesses (I hope you don't mind I added numbers to your image).
1)The yellow crab spiders I'm not sure about, but are certainly something in Crab Spiders (Thomisidae).
2) The green spider is a Eustala species.
3) Can't tell.
4) Ghost Spider.
5) Neoscona sp.
6) Jumping spider, Eris militaris - Bronze Jumper(female)
7) White crab spider - maybe Misumena vatia
8) Sixspotted Orbweaver (Araniella displicata)
9) Neoscona sp.
10) Jumping Spider, maybe Eris militaris - Bronze Jumper (male)
11) Sixspotted Orbweaver (Araniella displicata)
12) Can't tell.
13) Running Crab Spider.
14) Neoscona sp.
15) The spider next to 10, 11, 9 & 8 is another ghost spider.

 
#7 Misumessus oblongus (Keyserling, 1880)
The large white crab spider is Misumenops oblongus*; I suspect that that smaller yellow crab spiders are all juveniles of the same species (at the very least, also Misumenops). I don't think we have a habitus image for this specimen, but I'll post some images tomorrow.

-K

* Misumessus according to Lehtinen & Marusik, 2008.

 
Habitus images
Just to double check... we're calling the small white spider #7, or the big white spider (half off the page) #7. My numbering wasn't too clear on those two. Maybe I figures they were likely the same species anyway?

 
i would think the larger one
Kevin will know for sure

 
Yes, the larger one. I'll che
Yes, the larger one. I'll check all the others, but I think they will all turn out to be juveniles.

 
Summary
I've got 8 seemingly mature females (recognizable sclerotized epigynal structures, including copulatory tubes visible), among these the large white one.

At least four specimens are still subadult females. But of these four, one is within a hair's breath of the final moult (you can see the newly formed fangs within the exterior to-be-moulted exoskeleton).

Final summary:
1)yellow crab spiders -- Misumessus oblongus f - 2 kept, lot kmp-10009
2) green spider is a Eustala species. Eustala anastera f - kmp-10004
3) Can't tell.
4) Ghost Spider. Anyphaena pectorosa f - lot kmp-10007
5) Neoscona sp. - missing, so far
6) Jumping spider, Eris militaris - Bronze Jumper(female) - lot kmp-10003
7) White crab spider - Misumessus oblongus f - lot kmp-10009
8) Sixspotted Orbweaver (Araniella displicata) f - kmp-10008
9) Neoscona sp. - abdomen not intact, no epigynum (this one or the other)
10) Jumping Spider, Eris militaris - Bronze Jumper (male) lot kmp-10003
11) Sixspotted Orbweaver (Araniella displicata) - missing
12) Can't tell.
13) Running Crab Spider. Philodromus vulgaris f - kmp-10006
14) Neoscona sp. - missing
15) next to 10, 11, 9 & 8: another ghost spider. - Anyphaena pectorosa f - lot kmp-10007

I'll amend this if the missing specimens turn up -- could be that they are still somewhere here on my desktop.

 
Wow great
The numbers are a great idea, I hadn't even thought of that.

 
And I'd like you to post
a close-up of both sides of the Eustala. It's a beauty. Also I meant to say maybe for #6. Any of the others that we don't have images for in your state for this month.. go ahead and post close-ups of both sides of the spider.

 
Will do
Sorry for cutting you off. :)

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