The final opportunity to try for the part of the Hon. Archibald Graham in the "Blindness of Virtue," which has been thrown open to Harvard men by Mr. Joseph P. Vion, will take place at the Park Theatre tomorrow afternoon at 4 o'clock. Mr. Vion and Mr. Holmes-Gore will act as judges, and the name of the successful candidate will be announced not later than Wednesday evening. There have been no changes in the terms of the offer as outlined in the CRIMSON of May 22.