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Photo#288370
Megachile sp. female - Megachile newberryae - female

Megachile sp. female - Megachile newberryae - Female
Anza-Borrego Desert State Park, San Diego County, California, USA
April 27, 2009
Size: BL ~ 16 mm?
I think this is the dorsal view of the same bee, but there is a chance it is a different bee that was also on Honey Mesquite.

Update: probably the female of # 288365. Both were on the same area of the same Honey Mesquite and the photos were taken sequentially.

Moved

looks like a female M. newberryae
subgenus Sayapis

 
Megachile newberryae female
How wonderful to get this female, photographed in late April on Honey Mesquite and another female photographed on Screwbean Mesquite in late June, http://bugguide.net/node/view/332978, to the same Megachile species! Thank you so much, Dr. Ascher, for all your efforts to identify these Anza-Borrego bees! I am very grateful!

Megachile
female

 
Megachile female
It's so interesting that this is the female. We puzzled over whether this was the same bee as #288365. It was the very next slide and seemed pretty similar--but there were differences we attributed to the angle. Now I see how different they are, especially in abdominal shape. Thanks for identifying this female.

 
slender
so subgenus is either Chelostomoides or Sayapis

 
Slender Megachile female
Thanks for pointing out that the more slender body build translates to certain subgenera.

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