• The American Red Cross Bloodmobile is at Huachuca Hall, 922 E. Fourth St., from 4 to 7 p.m. There is also a Bloodmobile at Sonora Hall, 910 E. Fifth St., from 5 to 8 p.m.

• The School of Music and Dance presents a guitar area recital at 11 a.m. in Crowder Hall.

• Jean-Vicente Palerm, director of the University of California Institute for Mexico and the United States, presents "Community-Based Coalitions for Rural Development in California," a lecture at noon in the MASRC Conference Room, third floor of the D ouglass Building.

• The University Activities Board Arts Committee presents "Comic Ca'Zine," an underground comic art exhibit continuing today through May 3 in the Union Gallery.

• The School of Music and Dance presents the world premiere of composer David Maslanka's "MASS" today and tomorrow. It features UA faculty member Faye Robinson, soprano, and Charles Roe, baritone; the University Wind Ensemble; Arizona Chamber Choir; U A Symphonic Choir; Tucson Arizona Boys Chorus; and organist Jane Smith. The performance begins at 7:30 p.m. at St. Thomas the Apostle Church, 5150 N. Valley View Road. Call 621-1683 for seating and cost information.