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We present the result of a survey for star clusters in M33 using theHST/WFPC2 archive images. We have found 104 star clusters, including 32 newones, in the images of 24 fields that were not included in the previousstudies. Combining these with previous data in the literature, we increase thenumber of M33 star clusters found in the HST images to 242. We have derived BVIintegrated photometry of these star clusters from the CCD images taken withCFH12k mosaic camera at CFHT. Integrated color-magnitude diagrams of the M33star clusters are found to be similar in general to those of star clusters inthe Large Magellanic Cloud, except that M33 has a much lower fraction of bluestar clusters. We find 29 red star clusters with 0.5 <= (B-V)_0 <= 1.1 and 0.7<=(V-I)_0 <= 1.2, which are old globular cluster candidates. We divide thecluster sample into three groups according to their (B-V)_0 color: blue starclusters with (B-V)_0 <= 0.3, intermediate color star clusters with 0.3 <(B-V)_0 <0.5, and red star clusters with (B-V)_0 >= 0.5. Most of the newclusters in M33 are located along the sequence that is consistent with thetheoretical evolutionary path for Z=0.004, Y=0.24 in the (B-V)_0--(V-I)_0diagram, while a few of them are in the redder side in the (V-I)_0 color. Thered clusters are found relatively more in the outer region of M33 than the blueand intermediate color clusters, and that many of the blue stars are located inthe HII regions. The luminosity function for the blue star clusters shows apeak at Mv ~ -7.3 mag, while that for the intermediate color star cluster showsa peak at the fainter magnitude Mv ~ -6.3 mag. The luminosity function for thered star clusters shows also a peak at Mv ~ -6.8 mag, although the number ofthe clusters is small.

A Catalog of New M33 Star Clusters Based on the HST/WFPC2 Images