Mordellistena masoni.
Size: approx. 4 mm. Photo: 05/01/16, 9 pm.

Another Tumbling Flower Beetle (also known as Pintail Beetles). The bugguide states that "this species resembles M. discolor and liturata, but may readily be recognized by several small spots between the bands." The genus has over 130 species in North America. 
bug guide (this photo):