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We have identified in the 2MASS database 693 known and candidate globularclusters in M31. The 2MASS J,H,K magnitudes of these objects have beentransformed to the same homogeneous photometric system of existing nearinfrared photometry of M31 globulars, finally yielding J,H,K integratedphotometry for 279 confirmed M31 clusters, 406 unconfirmed candidates and 8objects with controversial classification. Of these objects 529 lacked anyprevious estimate of their near infrared magnitudes. The newly assembled nearinfrared dataset has been implemented into a revised version of the BolognaCatalogue of M31 globulars, with updated optical (UBVRI) photometry taken, whenpossible, from the most recent sources of CCD photometry available in theliterature and transformed to a common photometric system. The final RevisedBologna Catalogue (available in electronic form) is the most comprehensive listpresently available of confirmed and candidate M31 globular clusters, with atotal of 1164 entries. In particular, it includes 337 confirmed GCs, 688 GCcandidates, 10 objects with controversial classification, 70 confirmedgalaxies, 55 confirmed stars, and 4 HII regions lying within ~3 deg. from thecenter of the M31 galaxy. Using the newly assembled database we show that theV-K color provides a powerful tool to discriminate between M31 clusters andbackground galaxies, and we identify a sample of 83 globular clustercandidates, which is not likely to be contaminated by misclassified galaxies.

2MASS NIR photometry for 693 candidate globular clusters in M 31 and the Revised Bologna Catalogue