The Pixies are now set to debut their new Kim Deal-less lineup at Chicago’s Riot Fest this September, joining a bill that includes The Replacements, Blondie, Violent Femmes, Mission of Burma, X, Dinosaur Jr and Peter Hook, among many others. The Pixies were added today alongside Joan Jett, TSOL and Suicidal Tendencies.

The Pixies today followed up last week’s free release of a surprise new track with more revelations, namely that the band is about to embark on a “massive global tour” to debut material off its follow-up to 1991’s Trompe le Monde with The Muffs frontwoman Kim Shattuck replacing the departed Kim Deal.

Two weeks after announcing the departure of bassist Kim Deal, the Pixies this morning surprised fans with the release of “Bagboy,” the band’s first new song since 2004 and one that sounds like may feature the backing vocals of the group’s now-former bassist. But it doesn’t.

The Pixies this morning announced that bassist Kim Deal — who has spent much of this year touring with the reunited Last Splash-era lineup of The Breeders — has left the band , and, in a statement attributed to Black Francis, Joey Santiago and David Lovering, say “we will always consider her a member of the Pixies.”

The Breeders brought their Last Splash 20th anniversary tour to Boston for a homecoming gig Thursday night, but ended up celebrating an earlier era as co-founder Tanya Donelly re-joined Kim Deal and Co. onstage for a pair of numbers, including a giddy, laugh-filled cover of The Beatles’ “Happiness is a Warm Gun.”

The Breeders took advantage of a break in their tour in support of the 20th anniversary reissue of Last Splash to swing by “Late Night With Jimmy Fallon,” where the band played its 1993 alt-rock smash “Cannonball” on air and then stuck around for a web-only performance of the album’s penultimate track, “Drivin’ on 9.”