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San Gabriel River Flood Control Basin, west of rock quarry, Irwindale, Los Angeles County, California, USA
April 23, 2007
Size: ~ 9mm
On Encelia farinosa.
Looks like a megachile, but don't know whether any more can be said based on these photos. I'm posting an image of a male from the same site.

Images of this individual: tag all
Megachile Megachile Megachile


Megachile (Megachiloides) sensu lato
this resembles M. wheeleri, among others; there are many similar species of Megachiloides

Thanks again, John!
Though at the edge of urban areas, this bee flies in one of the last remnants of riparian foothill scrub (Scalebroom series) in SoCal.

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