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Unknown Leaf Beetle - Derospidea brevicollis

Unknown Leaf Beetle - Derospidea brevicollis
Lake Dallas, Denton County, Texas, USA
June 6, 2014
These beetles have been all over our Prickly Ash (Xanthoxylum)tree for several weeks now. I've seen as many as 15 at a time, most appear to be gravid females. First time I've seen these, looks like it would be an easy one but I can't find it a match I'm satisfied with.

Moved from Beetles.

Moved from ID Request.

Given the host...
...I'm wondering if this might be Derospidea brevicollis:

Hold on to see if the experts agree.