On Apr 20, 2009, Malus2006 from Coon Rapids, MN (Zone 4a) wrote:
Have seen this species in my neighbor's pool - they are tough to die compare to flies, etc which doesn't last long. They are very attracted to the water - they are rather large for sweat bees. They have a metallic green upper body while the lower bodies look strongly like a wasp even down to the shape and colors. Noticed in August.