El Paso, El Paso County, Texas
Coordinates: 31.755001, -106.250932
August 2, 2015
Determined by John S. Ascher
These bees were swarming on flowers of Tidestromia lanuginosa (woolly tidestromia) and flying with amazing speed in zig-zag patterns, competing for flowers.
Hymenoptera-Andrenidae-Perdita cladothricis (C)
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