CINCINNATI - Brood X, the largest and most widespread brood of cicadas in the U.S., is set to emerge from the ground this spring after 17 years.
The periodical cicadas, which are different than the annual cicadas seen throughout the U.S. each year, last emerged in 2004.
Beginning in mid-May, they will likely appear in 15 states: Delaware, Georgia, Illinois, Indiana, Kentucky, Maryland, Michigan, North Carolina, New Jersey, New York, Ohio, Pennsylvania, Tennessee, Virginia and West Virginia, along with Washington, D.C., according to Cicada Mania, a website that tracks cicada life cycles.There are several species of periodical cicadas that emerge in different years, classified by scientists as different "broods." Each brood is isolated in a.