As promised, veteran British rockers Jethro Tull [ tickets ] have added more shows to their world tour, including several North American dates in the East.

The band, which will stay busy touring Europe through mid-September, is scheduled to kick off a North American leg Sept. 24 in Calgary, Alberta. Following a handful of Canadian gigs, Jethro Tull will begin its US run Sept. 30 in Seattle and make its way across the country (along with a few more stops in Canada) through mid-December. Domestic shows are listed below, and overseas dates can be found at the band's website.

Most of Jethro Tull's concerts this year will be either all acoustic or a mixture of acoustic and electric, according to an online posting from singer/multi-instrumentalist Ian Anderson. He added that his "old ears have been ringing for most of the 39 years of Tull touring" and the lower volume means "I can enjoy performing so much more."

Musicians who will join Anderson and longtime Tull guitarist Martin Barre on tour include John O'Hara (piano, accordion), David Goodier (bass) and James Duncan (drums, percussion). Drummer Doane Perry, who joined the band in the mid-'80s, will also return to play on select dates.

The live shows will offer fans new material and re-worked versions of Jethro Tull classics, according to Anderson, who said the set list will pay homage to Mozart, Keith Emerson and King Henry VIII.

The tour's March launch was accompanied by the release of "Best of Acoustic Jethro Tull," a 24-song compilation of Anderson's favorite tunes from over the years, plus a couple of live bonus tracks. The musician has said there are no plans to record a new studio album in the near future.

Tull, which has been around since the late '60s, has incorporated everything from classical, to folk, jazz and art rock in its music. The group, often labeled as prog-rock, has sold about 60 million albums and played more than 2,500 concerts in 40 countries, according to its bio.