I really thought the entomologist(s) on the group would respond.
Anyway I did a search on
grass wasp and found references to a wasp species named, Isodontia
auripes. One site at NC state called them "grass-carrier" wasp,
http://www.ces.ncsu.edu/depts/ent/cl...0/graswasp.htm.
The pictures that I found were of the inside of a nest, so I don't know
how that compares to what's at my house. All I saw were the wasps going
into the ex-carpenter bee holes with a long blade of grass in tow. Now
I see the bee holes with the pieces of grass sticking out.
It's a very curious thing!
Eileen