The journey of Los Lobos began in 1973, 50 years ago this year, when David Hidalgo (vocals, guitar, and pretty much anything with strings), Louie Perez (drums, vocals, guitar), Cesar Rosas (vocals, guitar), and Conrad Lozano (bass, vocals, guitarrón) earned their stripes playing revved-up versions of Mexican folk music in restaurants and at parties. The band evolved in the 1980s as it tapped into L.A.’s burgeoning punk and college rock scenes. They were soon sharing bills with bands like the Circle Jerks, Public Image Ltd. and the Blasters, whose saxophonist, Steve Berlin, would eventually leave the group to join Los Lobos in 1984.