Dear Public Service Director: The University of California, Davis, would appreciate public service announcements on your broadcast station concerning an upcoming benefit exhibition honoring the late Robert Arneson, a former UC Davis art professor. The following announcement is :15 in duration: Attend a special reception for the Robert Arneson tribute exhibition Saturday, May 18, from 7 to 9 p.m. at the John Natsoulas Gallery in Davis. For more information, call (916) 756-3938. The following announcement is :30 in duration. Plan to attend a special reception for a benefit exhibition honoring the late UC Davis art professor Robert Arneson. To be held at the John Natsoulas Gallery in Davis, the opening night reception from 7 to 9 p.m. Saturday, May 18, will feature music by "Cold Shot" and artworks by Wayne Thiebaud, Ruth Rippon and David Hollowell, among others. All proceeds will benefit the Robert Arneson Chair in Ceramic Sculpture at UC Davis. For more information, call (916) 756-3938. The P.S.A. should be discontinued Sunday, May 19. Thank you for your assistance.