Pi Eta Play in Cambridge Tonight.

The first Cambridge public performance of the Pi Eta Society's new comic opera "The Will-o-the-Wishp" will be given in the club theatre on Winthrop square this evening at 8 o'clock, and the second and third performances in the same place tomorrow and Friday evenings. Tickets are on sale at Thurston's.

During the recess, the opera was presented in Lowell, Winchester, and Boston. The audience in each a case was large, and gave the play a reception which established it as a pronounced success. It is a well-developed, continuously entertaining opera, with some particularly strong features in the music, the dances, and the impersonations by several of the principals, and has received very favorable comment from professional critics.