Due to a scheduling conflict on the part of the National Players, BC3 must cancel its Performing Arts Series show at 8 p.m. Saturday, "The Importance of Being Earnest."

For more information, call 724-284-8505.

• "Tuba-Euphonium Day at The Rock" will take place Monday when the U.S. President's Own Marine Band Tuba/Euphonium Quartet visits SRU for a free, 7:30 p.m. public concert in Swope Music Hall.• The American stereotype of "Mammy" will be confronted in "The Evolution of African-American Women" at 8 p.m. Thursday in Swope Recital Hall on campus.

Pitt's Kuntu Repertory Theatre will present "Relativity," the story of a mother-daughter conflict over genetic research and social issues, through April 7 in the Seventh Floor auditorium of Alumni Hall, 4227 Fifth Ave. in the Oakland section of Pittsburgh. Performances begin at 8 p.m. Thursdays through Saturdays and at 4 p.m. Sundays. Matinees are scheduled at 1 p.m. March 31 and 11 a.m. April 5. Call 412-624-7298.

The Regina Gouger Miller Gallery on the CMU campus presents "Tides" through March 30. For more information, call the gallery at 412-268-3618 or view the Web site at www.cmu.edu/millergallery.Hours of operation are 11:30 a.m. to 5 p.m. Tuesdays through Sundays. Visitor parking is available in the East Campus Parking Garage, located on Forbes Avenue just east of the Morewood Avenue intersection.