What flying insect is brownblack with one matching round spot on each wing and has a stinger like thing around mouth area?

I believe that it is an assassin bug. If you read on it says that it is the most painful bug bite on the continent. Hopefully this is your bug. It bit my eight year old son last night and he was in terrible pain. Copy and paste this to see if this is your bug. http://bugguide.net/node/view/20504