Search for Rare Particles with the MACRO Detector
  We report on the search for Rare Particles (Magnetic Monopoles, Nuclearites, Weakly Interacting Massive Particles and Lightly Ionizing Particles) with the MACRO detector. For magnetic monopoles (the main goal of the experiment) our limit is about 0.4 times the Parker bound for monopole velocities between 10^{-4} and 10^{-1}. 
Fabrizio Cei (University of Michigan) (for the MACRO Collaboration)