Harlequin Punnett Squares
The following Punnett squares show predicted outcomes for harlequin matings:
Harlequin to Harlequin
Harlequin to Black (Harlequin carrier)
Harlequin to Black (Non-harlequin carrier) 
Black (Non-harlequin carrier) to Merlequin
Black (Harlequin carrier) to Merlequin
Black (Harlequin carrier) to White
Black (Non-harlequin carrier) to White