Alt-rockers Papa Roach [ tickets ] have tacked more stops onto their in-progress fall tour behind their spring release, "Metamorphosis."

Since last check, 17 shows have been added to the nationwide outing, which now extends into mid-December. Concerts are planned in Baltimore (11/9), New York City (11/12), San Antonio (11/18) and San Diego (11/28), among others, before the excursion concludes Dec. 13 in St. Louis.

A handful of the new performances will also include Jet as co-headliners. Details are below.

In conjunction with the shows, Papa Roach will host auctions in the tour markets for fans to bid on exclusive packages, such as an opportunity to interview the band, side-stage tickets and more. Proceeds will go to World Hunger Year, a national non-profit dedicated to fighting the root causes of hunger and poverty.

Papa Roach released "Metamorphosis," the band's fifth studio set, in March. Written at Southern California's historic (and reportedly haunted) Paramour Mansion, the latest album follows the group's 2006 effort, "The Paramour Sessions," which was recorded at the famous estate.

"We went in and started jammin'," singer Jacoby Shaddix explained about the new album in a recent interview with LiveDaily. "I just f---ing went at it, went to town, broke down all the walls inside myself and just let it all out. I mean, no reserve."

Earlier this year, Papa Roach marked the 10th anniversary of their signing to Dreamworks Records with a special appearance at West Hollywood's The Troubadour, the LA-area club where the band was discovered.

Watch Papa Roach's live acoustic performance for LD Sessions.