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.
This map is intended to portray only an approximate, present-day brood distribution. It is based on previously published maps (Marlatt 1923; Simon 1988) and unpublished data. However, it has not been field checked, and it does not portray historical reports of brood emergences. A project is currently underway to make new maps of periodical cicada broods. See the Magicicada mapping project homepage.
Literature:
Marlatt, C. 1923. The Periodical Cicada. United Stated 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.
©2008