Tachytes sp. (Green-Eyed Wasp).
 
 
 
Size: approx. 10-20 mm. Photo: 08/03/11, 11 am.


 This green-eyed wasp belongs to the genus Tachytes which has 35 species in North America. 
 
 
bug guide (this photo):
http://bugguide.net/node/view/556764