Dixville, Coos County, New Hampshire, USA August 29, 2005
I don't think it matches up with the Bald-faced Hornet, Northern Yellowjacket, or the Blackjacket. If I'm right, the only one left is Dolichovespula albida. Since I've never seen a picture of the 4th species mentioned, I could use some help to let me know what this wasp is. Thanks.