Lobiopa sp..
 
 
 
Size: approx. 6-7 mm. Photo: 08/04/12, 10 pm.


The genus Lobiopa has seven species in North America and belongs to the family of sap-feeding beetles. 
 
 
bug guide (this photo):
http://bugguide.net/node/view/684802
C. T. Parsons, Psyche 45, 156 (1938):
http://www.hindawi.com/journals/psyche/1938/061652/abs/