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Photo#136535
blue black wasp - Auplopus - female

blue black wasp - Auplopus - Female
Aromas, San Benito County, California, USA
August 13, 2007
Size: approx 1 inch long
I watched 4 or 5 of these little wasps land at the edge of our garden pond (8'x10' x 3' deep, with recirculating waterfall & 20' stream). They would disappear into the leaf litter between the rocks at the water's edge, possibly to obtain either water or mud; and fly away a few minutes later. They were very active, not staying still but for a couple of seconds. I found pictures of Chlorion & Chalybion which appear similar; but these guys don't appear to have the slender petiolate constriction between the thorax and abdomen that I would expect in those two genera.

Images of this individual: tag all
blue black wasp - Auplopus - female blue black wasp - Auplopus Auplopus architectus - Auplopus

Yes.
Auplopus, most likely architectus based on pilosity.

 
Thank you
Thank you Nick & Edward for the quick ID. BugGuide is an outstanding website.

 
Sex
Once the IDer tells you the sex of your bug you can edit your entry and add that info to it. It saves the editors some time.

spider wasp -female
family Pompilidae, in the genus Auplopus... they gather mud for their nests as well. i will leave comments about the species to Nick. anywho, these are some wonderful pictures.

 
Echoing all of that:-)
Yes, exquisite images! I agree with the ID as well.

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