Ferruginous Spider Wasp - Tachypompilus ferrugineus -
Essex, Ontario, Canada August 5, 2006 Size: About 18 mm
Believe this is a female. She burrowed two holes, side by side, under a limestone walkway slab. The only flowers I saw her nectar on were mints - Horsemint (Monarda punctata) and Virginia Mountainmint (Pycnanthemum virginanum).