When the case of the four Freshman parade-busters comes up for trial by appeal in Superior Court sometime next week, Police Chief Timothy Leahy will probably hie himself to court and request that charges be dropped, he said yesterday.

"We don't want to do anything that will remain as a blot on Harvard boys' records," Leahy annouced. The chief intimated that the evidence whereby Joseph Ambrose, James M. Blumgarten, Joh S. Caylor, and Frank Pemberton, Jr., were convicted of "disrupting a public assembly" by Judge Arthur Stone on October 18 was inconclusive.

Although a transcript of the trial has not yet reached the District Attorney's office, a spokesman predicted Thursday that the State would probably not prosecute if the Cambridge police intervened on behalf of the defendants.

It was explained, however, that since district Attorney Warren A. Bishop was defeated last Tuesday in his fight for reelection largely on the ground that he "nolle prossed" too many cases, the State may be forced by the pressure of public opinion to prosecute unless such intervention is forthcoming.