The funk-jazz outfit Galactic is celebrating its 10-year anniversary at the same time it is saying farewell to a major part of its act. Citing health concerns, Theryl "The Houseman" DeClouet will no longer be a permanent member of Galactic. "He can't really hang with our touring level," says bassist Robert Mercurio. "It's going to be best for his health and everyone's mental state." Once the summer tour wraps up, he says, the band will take on a new phase of its career. "We're going to be instrumental. We're going back to how we started -- just the five of us." To prepare for the instrumental jaunt, Galactic will take off the month of September to "dive in and spend more time writing instrumental stuff." However, the band isn't totally writing off the possibility of hiring another singer. "We're still leaving it open," says Mercurio. The band members are also considering recording with guest vocalists, although Mercurio wouldn't reveal who is on his aural wish list.