[fastpat]

Originally posted by competentone
http://www.bugpeople.org/taxa/Hymenoptera/Sphecidae/Chalybion_californicum/Chalybion_californicumPage.htm


http://animaldiversity.ummz.umich.edu/site/accounts/information/Chalybion_californicum.html

No, it's not this kind, but it looks like them. The ones I have are social not solitary, and their nest is paper not mud. That's what makes them so unusual.