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Crabronid - Stizus brevipennis - female

Crabronid - Stizus brevipennis - Female
fayetteville, washington County, Arkansas, USA
August 15, 2006
Size: around 25mm
would this be in the genus Bicyrtes perhaps?

Images of this individual: tag all
Crabronid - Stizus brevipennis - female Crabronid - Stizus brevipennis - female Crabronid - Stizus brevipennis - female

Moved from Digger Wasps.

I don't think Bicyrtes...
Because antennae are a bit too strong, and overall outline reminds more of a member of the Gorytini - especially Sphecius - rather than Bembecini tribe. Knowing the kind of preys the female brings back to its burrow would help to identify this superb Nyssoninae.

i fall a little short when attempting to identify anything in that subfamily, well i am not great at identifying much of anything at all... i have tried to keep an eye out for what my go down that hole other than wasp, but as yet i have not seen her with anything. thank you for the information Richard, is there any place i should move this, or leave it up for a while to see who else wants to give their two cents?

For a while...
say, two days, these three pictures should be let there. After, you'd better mowing them under Nyssoninae subfamily, as unidentified taxon.
Now I realize this insect could also well belong to the Stizini tribe. Consulting the checklist at, I found there are five species of Stizus and two species of Stizoides in North-America. Both genera hunt for Grasshoppers.
One can see right antenna of "your" specimen was cut down. Although a conspecific, rival female could have done that, a wannabe prey is more likely to be the culprit.

Last time I tried to twist my head around and look at wing veins Eric swooped in to tell me I was trying to discern them on a bee. Here I think it is safely Sphecid. And I can almost imagine the elongate and distal marginal cell of the Stizini (you know, with encouragement). In the east there is only one Stizus species, S. brevipennis, and there is only one Stizoides species, S. renicinctus. Our Stizoides is a kleptoparasite of Prionyx. So I am not sure you would witness it building a cache burrow before the theft. Our Stizus takes Katydids. I will let Eric say definitively whether this is Stizus brevipennis.

i thank you both... i think i might now favor Stizus, but i will wait for Eric to give the word on it being S. brevipennis or no. all i know is i need to work on my Sphecids.

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