Gaia DR2 CMD for all bright stars (5 <  G <  12 mag) with parallaxes > 2 mas (yellow dots). Overplotted as green dots are stars with a parallax precision better than 10% (RPlx >  10) and well-behaved astrometric solutions, i.e. RUWE < 1.4 and an increased number of visibility_periods_used (Np >  9). Filled and open lozenges show all old and new Ap stars with available Gaia measurements (including those with low astrometric quality), respectively.