Deleteing inside a list using iterators

I need help, when i am looping through my list using iterators i need them delete themselves when they leave the screen my code is

for(salvoit = salvo.begin(); salvoit != salvo.end(); )
        {
            if((*salvoit)->x < 0 || (*salvoit)->x > 640)
            {
                delete (&salvoit);
                salvoit = salvo.erase(salvoit);
            }
            else
            {
                salvoit++;
            }
        }

whenever i run this it gives me an error when it tries to delete the object in the list. salvo is the list and salvoit is the iterator.