Reid Laurence "Larry" LaLonde (born September 12, 1968), also known as Ler LaLonde, is an American musician best known as the guitarist for Primus, a position that he has served since 1989, where he is known for his highly technical and experimental accompaniment to the bass playing of bandmate Les Claypool. Previously, he played guitar for the groups Possessed, Blind Illusion, No Forcefield, and the Frank Zappa tribute band "Caca". He also has collaborated more recently with artists such as Serj Tankian and Tom Waits.