repeat of the student protests of 1968, an event the new government denounced. But most Mexican rock bands sang and criticized the administration in general and, more specifically, corruption, poverty and persistent social inequalities that had taken place through Mexican history. With the Avandarazo effect at its height and the hippie movement waning worldwide, few bands survived the curbs; though the ones that did, like Three Souls in My Mind (later El Tri), remained popular due in part to their adoption of Spanish for their lyrics, and had a dedicated following. As the hippie trend waned c. 1973, many Mexican bands moved to progressive and hard rock. During the seventies there were many new bands but very little support from the music industry for original rock music. The bands suffered from it and had to limit themselves to performing in . Representative bands of this period were: Perro Fantastico, Mara, Vox Populi, Stray Cat, Rock Moviloy and many more. Perro Fantastico, a band from the east side of Mexico City (Ciudad Nezahualcoyotl) created rock music sung in both Spanish and English, formed by the brothers Jose Luis and Jaime Francisco González (guitar and bass) with Guillermo Avalos (drums) and Arturo Fajardo (rhythm guitar). They played, among other bands, in places like Salon Chicago, Macumba, El Herradero until the band disbanded around 1978. During the seventies bands also performed in high schools, universities and other places. Many others followed or continued during the eighties. Ban on Rock The government's ban on rock music during this decade also extended to American groups, and after a 1975 concert in Mexico City by the band Chicago ended with turbulence and police repression, president Echeverría issued a temporary ban on all concerts by American musicians in Mexico. Metal Since the 1960s, hard rock had been assimilated by several groups, like the aforementioned Los Dug Dugs and El Ritual, and later by others like Polvo and Náhuatl, Nuevo México and Bloody Rock. During the following decade it continued to exist in forms of heavy blues, which was an authentic underground movement, peaking in the late 1970s when the Hoyos Funky came to notoriety around 1977. Groups like Ramses and La Cruz are veterans of the era and were some of the first to be labeled as "heavy metal", but then again it was not until the 1980s and the early 1990s that bands like Transmetal, Next,