Pachodynerus erynnis (Red-Marked Pachodynerus).
 
 
 
Size: approx. 10 mm. Photo: 09/04/11, noon.


I believe this specimen belongs to the Potter and Mason Wasps. Probably the Red-Banded Mason Wasp Pachodynerus erynnis. This wasp is common in the Southeastern US and often builds nests under the siding boards of buildings. 
 
 
bug guide (this photo):
http://bugguide.net/node/view/572049
Texas A&M:
http://alturl.com/5kdfk