5 Conclusions

Cluster parameters based on CCD photometry were derived for NGC 6256 and NGC 6717. They are both located in the bulge, but are not metal-rich.

A new family of clusters in the bulge appears to be revealed from a series of recent studies. They show blue extented HBs, post core-collapse structure confirmed or suspected and intermediate metallicities. With the present study the two clusters NGC 6256 and NGC 6717 can be added to this class.

The other members showing these characteristics are HP 1 (Ortolani et al. 1997), NGC 6522 (Barbuy et al. 1994; Terndrup & Walker 1994), NGC 6540 (Bica et al. 1994) and NGC 6558 (Rich et al. 1998).

The identification of this family in the bulge was not recognized in early CMDs because they did not attain the blue extended HB.

Acknowledgements

BB and EB acknowledge partial financial support from CNPq and Fapesp.