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Photo#836530
Small, black beetle on flowers (2) - Bothrotes

Small, black beetle on flowers (2) - Bothrotes
Great Sand Dunes National Park, Alamosa County, Colorado, USA
September 2, 2013
There were a lot of these, mostly on yellow flowers. Some had bumps or ridges on the pronotum, and some had little or none. I'm not sure whether they're the same species.
An individual with no ridges:

Images of this individual: tag all
Small, black beetle on flowers (2) - Bothrotes Small, black beetle on flowers (2) - Bothrotes

this one is a male
Moved from Beetles.

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