Beware of this little bee

This year we have a bee buzzing around that I have never seen before. It looks like a small yellow jacket but unlike the yellow jacket this bee loses its' stinger when it stings. The reason I am writing this is that one stung my dog. Now a dog can take about ten times the amount of pain that a human can before they cry out. This dog of mine has been stung several times this year by honeybees and makes no sound at all she just eats the offending bee and goes on with her day. This little bee however had her screaming for 5 minutes and unable to move her leg for about 15 minutes. She also showed the signs of going into shock, very fast heart rate, ragged shallow breathing and her legs went cold. A paste of baking soda on the sting seemed to help a lot and after twenty minutes she was ok and starting to move her leg again. After half an hour she was walking but not putting any pressure on the stung foot. All problems except the swelling have gone after eight hours.She weighs around 40 pounds and like I said she is not alergic to bee stings in the least so that only means that this little bee packs one heck of a powerful sting. I would hate to see one of these little bee sting a small child, the reaction I saw in my dog makes me think these things could send a child to the emergency room in a hurry so beware.
I sent the picture to the Cincinnati Zoo and asked them to please identify the bee. As a further note these guys eat wood and although I don't know what the nest looks like, they built one in the wall of my house by eating away the wood trim under the eve. I have sprayed the opening with wasp and hornet poison to try and kill them as well as plugging the hole with caulk so we will see if I got rid of them or they just open another hole somewhere.