Theatre

Iolanthe.Come see fairies invade Parliament! "Iolanthe" is one of Gilbert and Sullivan's best, fraught with confusion, mixed identities, love triangles, and includes what is generally considered G&S's best patter song. Agassiz Theatre, 8 p.m. $3-$7 for students. Call 496-HRGS for tickets.

Love, Sex and the I.R.S.Roommates Jon and Leslie have trouble making ends meet, until Jon starts filing their tax returns as a married couple. The only problem is Leslie's a man! Now the I.R.S. is after them, and Leslie has to decide how far he'll go to protect a friend. Leverett Old Library, 8 p.m. $4 for students; $3 for Leverett residents. Call Jose at 493-3798 or Terri at 493-3556 for tickets.

TrIIIo.Featuring "Maelstrom," Nightmare," and "The Family." Join us for a truly experimental evening featuring three original one-acts. Join a cast of unusual characters in their world of relationships gone haywire, families torn apart and dreams and nightmares lost in a maelstrom of reality and fantasy. Loeb Experimental Theatre, 7:30 p.m. Free.

America.A.R.T. New Stages at the Hasty Pudding Theatre. The newest work by African-American writer Suzan-LoriParks is a creative meditation on the character of Abraham Lincoln and his impact on black people throughout the century following emancipation. Hasty pudding Theatre, 8 p.m. $18-$36. Call 547-8300 for tickets and more information. 8 April Friday

Concert

Radcliffe Choral Society.Presents " A Celebration of Spring," with special guests, the Brown University Chours. Works to be performed include compositions by Bach, Bartok, Joplin and Michael Haydn. Sanders Theatre, 8 p .m. $5 for students.

Winthrop House Music Society.The Mid Sussex Boysingers, conducted by Roger Lunn. Di Giovanni Hall, 29 Mt. Auburn St. Donations will be taken.

Conference

Preparing for the 21st Century: Reclaiming the Initiative in Africa.Through April 10. An inter-collegiate conference on Africa including speakers and workshops on such issues as Africa's relations with the international community, the impact of a non-racial South Africa and the role of women in Africa. For more information, call Koranteng Ofasu-Amaah at 493-0326. Registration fee of $15, reduced rate for Harvard affiliates, Kennedy School of Government.

Film

Harvard Film Archive.Carpenter Center. $5 for students. "The Crimson Kimono" at 5 p.m. "My Crasy Life" at 7 p.m. "Son of the Shark" at 9:30 p.m.

Theatre

The Fire on the Snow.A symbolic interpretation of Captain Scott's 1911 expedition to the South Pole. Men at the edge of the world and at the edge between life and death. Cabot House Underground Theatre, 8 p.m. $2:$3 at the door. For tickets, call Will Posten at 493-3160.

Iolanthe. Please see Thursday's listing.