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Pterocheilus quinquefasciatus
About 12-14 millimeters in body length, colored as shown. Note larger size, dark face, and shorter, blunt-tipped antennae. These are all female characteristics.
Wasp was taking nectar on flowers of a lone, blooming saltcedar tree (Tamarix sp.) in a vast open field of degraded shortgrass prairie with sunflower, yucca, and scattered elm trees.
Identification furnished by Dr. Matthias Buck, Royal Alberta Museum, Canada.
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