Skip to main content Longwave's Steve Schiltz will fill in for the founding guitarist on the summer tour The Strokes' Nick Valensi Valerie Macon/AFP via Getty Images The Strokes will embark on the Reality Awaits Tour without a founding member as the band announced that guitarist Nick Valensi is taking a “temporary break”from the summer trek. The group appeared Thursday night on  The Late Show With Stephen Colbert , and Valensi was noticeably missing from the performance of the  Reality Awaits  track “Falling Out of Love.” Soon after, the Strokes explained the guitarist’s absence on social media. “Nick will be taking a temporary break from the scheduled tour, but we look forward to his return,” the band wrote, adding that “our old Steve Schiltz, who many of you will remember from the early NYC days,” would fill in for Valensi; Schiltz served as singer and guitarist in the similarly Y2K-era NYC band Longwave.…