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ID for tiny bee on Toyon? - Perdita - female

ID for tiny bee on Toyon? - Perdita - Female
Claremont, Los Angeles County, California, USA
June 17, 2011
Size: Approx. 3-4 mm?
These tiny bees were all over the flowers of Toyon (Heteromeles arbutifolia) at the Claremont Colleges Robert J. Bernard Biological Field Station – there were clouds of them! I originally thought there were two different species, but after looking at Ron Hemberger's post:

I suspect these are female Perdita rhois, and the others with the yellow faces and antennae are males. Ron's bees were also on Toyon at the Rancho Santa Ana Botanic Garden, which is literally next door to the field station. Any information will be greatly appreciated!

Other images in this series:


Perdita (Perdita)
probably in the ventralis species group

they do resemble P. rhois and may very well be that species

Thanks for the identification!

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