In a large bowl, beat the cream cheese and mayonnaise, until smooth. Add cheddar cheese, chilies, jalapeno peppers and 1/4 cup Parmesan cheese until blended. Spoon into an ungreased1-1/2-qt. baking dish.
In a small bowl, combine the bread crumbs, remaining 1/4 cup Parmesan cheese, and melted butter. Sprinkle over cream cheese mixture.
Bake uncovered for 20-25 minutes or until golden brown. Sprinkle with fresh chopped parsley. Serve with bread or crackers.