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Photo#225058
Trachusa (Heteranthidium) larreae on Honey Mesquite 1 May 2008 Sentenac Cienega, ABDSP, CA - Trachusa larreae - female

Trachusa (Heteranthidium) larreae on Honey Mesquite 1 May 2008 Sentenac Cienega, ABDSP, CA - Trachusa larreae - Female
Anza-Borrego Desert State Park, San Diego County, California, USA
May 1, 2008
Size: about 12-12.5 mm
This face thorax view is not of the same bee, but I'm fairly sure it is of the same species. It was taken at the same time on the same mesquite and has many features in common. However, the thorax differs in being strongly margined with yellow and has two slashes. Do I have a dimorphic pair?

Trachusa larreae
female

the other image is of a male

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