Guardian art director Mirissa Neff checked out Os Mutantes on Monday, July 24, at the Fillmore and sent back these words and images.

All photos: Mirissa Neff

Reuniting for their first tour since 1973, Os Mutantes were greeted by a ravenous SF crowd ranging from hipster admirers to rowdy Brazilians. Here, Zelia Duncan and Sergio Dias have a moment during the Tropicalia legends' set at the Fillmore.

The word on the street is that they are planning to put out a new release -- perhaps targeting the US market? Maybe that's why so many songs that were originally in Portuguese were performed in English.