Brood XIII (17-year)
The Northern Illinois Brood
Brood XIII was historically recorded in MI, and older maps (Marlatt 1923; Simon 1988) show intriguing populations following the MI border with IN (see top map). However, searching in 2007 failed to confirm the existence of these populations, so the bottom map is considered to be more accurate.
Marlatt, C. 1923. The Periodical Cicada. United States Department of Agriculture, Bureau of Entomology Bulletin 71.
Simon, C. 1988. Evolution of 13- and 17-year periodical cicadas. Bulletin of the Entomological Society of America 34:163-176.