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Photo#200849
What is this - a beetle??? - Ripiphorus vierecki - female

What is this - a beetle??? - Ripiphorus vierecki - Female
Tucson Mountain Park, Pima County, Arizona, USA
July 11, 2008
Size: 1/2 in

Images of this individual: tag all
What is this - a beetle??? - Ripiphorus vierecki - female What is this - a beetle??? - Ripiphorus vierecki - female What is this - a beetle??? - Ripiphorus vierecki - female

Moved
Moved from Ripiphorus rex.

Moved
Moved from Ripiphorus.

Ripiphorus rex
I think

 
Ripiphorus rex (Champion 1891)
Indeed, you are correct. This is one of the (rarely) distinctive species- Ripiphorus rex, a female.

Cheers,
zack

 
At least superficially similar -
Works in terms of distribution. Can you see the serrated edge of the middle tibia on your specimen? If so, is it possible to get a close-up shot where this can be seen?
I don't know enough about these, but if it has the diagnostic serrated middle tibia that would be it. I could show the photos to Jim Hogue for confirmation.
Also, they might have this in their collection at the Desert Museum.

 
I'll check
the tibia

Great shots!
and at the right time, considering their short life span. This looks like a female ovipositing (see also Ron Hemberger's excellent shots 1 ), so that her offspring, as triungulins / first instar larvae, can become cling-ons on visiting wasps or bees. The plant appears to be something asteraceous.

 
The Plant
is Desert Marigold, Asteraceae

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