The Michigan Catalogue (Vol. I – V) is an excellent database to study the distribution of CP2 stars in the galactic field in the Southern hemisphere. A cross-check with the Bidelman-Catalogue (1973) and the “Catalogue Général des Étoiles Ap et Am” (Renson 1991) shows that in the Michigan Catalogue 3.6% of all stars in the relevant spectral region are CP2 stars. Any discrepant classified stars could be verified photometrically in the $\Delta a$-system. The distribution of CP2 stars does not show any particular preferred region in the Southern hemisphere. The ages of these stars and an evolutionary dependence of the CP2 effect was another important question. We conclude that the CP2 stars occupy the full Main Sequence band.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html