Joseph V. Scelsa, who was one of the institute’s first directors and led the legal fight that resulted in the settlement, said Italian-Americans seemed to be well represented on the staffs of other New York-area colleges, but had long been mistreated at CUNY.

“There have been so many cases of discrimination that I personally know of  from not getting hired to not getting promoted to not getting tenure,” said Dr. Scelsa, who is now president of the Italian American Museum in Manhattan. “It’s so clear that there’s been no serious attempt to increase our numbers.”

The latest skirmish centers on a lawsuit filed in July in United States District Court by Vincenzo Milione, a researcher at the institute, now known as the John D. Calandra Italian American Institute, in memory of the state senator who first held hearings on Italian-Americans at CUNY.

The suit says CUNY and the institute’s current director, Anthony J. Tamburri, retaliated against Dr. Milione, cutting his staff and rescinding a prestigious job title, after Dr. Milione, in 2006, made a presentation to Italian-American state lawmakers. In the presentation, Dr. Milione argued that Italian-American representation on the faculty and the staff had remained flat  between 5 percent and 6 percent  over three decades, while that of groups like blacks, Latinos and Asians had climbed.

“Did affirmative action work at CUNY?” he asked in a recent interview. “Yes. But it did not work for Italian-Americans.” The New York office of the Equal Employment Opportunity Commission ruled that his suit had merit.

CUNY officials said that Dr. Tamburri would not comment, but they defended the university’s record. As of last fall, they said, Italian-Americans represented about 7 percent of the full-time instructional staff of 11,000, up from 5.8 percent in 1981. While the increase was modest, it occurred while the proportion of white employees fell sharply, to 54 percent from 74 percent, as the university strove to hire blacks and Latinos.

“Were CUNY not proactively engaging in affirmative action for Italian-Americans, one would expect to see Italian-American representation in CUNY fall at the same rate as that of whites,” Jennifer S. Rubain, university dean for recruitment and diversity, said in a statement. “That has not happened.”