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Small, slender wasps, about 8-10 mm in body length, marked as shown. Note wings are folded longitudinally.
Several females nesting in old beetle borings in a cottonwood log near stream. Habitat is riparian with open fields, scattered trees, milkweed, cattails, etc.
The wasps were being harassed by cuckoo wasps (Chrysididae).
Spotted on Jun 2, 2013
Submitted on Jun 12, 2013