Preheat the oven to 350 degrees Fahrenheit.
In a medium bowl, stir together the crema, mayonnaise, ¼ cup of Cotija cheese, Muenster cheese, lime juice, Worcestershire and cayenne until combined.
Fold in the chiles, crab meat, and the white and light green parts of the scallions (reserve the rest for garnish), being careful not to break the crab up too much.
Transfer the mixture to an oven safe dish. Sprinkle remaining Cotija cheese on the top. Bake for 30 to 35 minutes, or until it is bubbly and golden brown. Sprinkle on the reserved scallions. Serve with crostini, crackers or chips.