Periodical Cicadas





Brood X (17-year)

The Great Eastern Brood

Brood X is the largest (by geographic extent) brood of 17- year cicadas. Populations historically recorded from KY may be off-cycle emergences of Brood XIV (see: Lloyd and White 1976). Brood X has also been reported from MO; however, current opinion on these records is that they date from a co-emergence of XIX and X, and that they were mistakenly attributed to X. For a discussion of Brood X in MO, see: Marshall 2001). MI populations are generally only M. septendecim; however, M. cassini has been recorded in the state (Marshall et al. 1996).
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 It is based on previously published maps (Marlatt 1923; Simon 1988) and unpublished data.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.
Lloyd, M., and J. A. White. 1976. Sympatry of Periodical Cicada Broods and the Hypothetical Four-Year Acceleration. Evolution 30:786-801.
Marlatt, C. 1923. The Periodical Cicada. United Stated Department of Agriculture, Bureau of Entomology Bulletin 71
Marshall, D. C. 2001. Periodical cicada (Homoptera : Cicadidae) life-cycle variations, the historical emergence record, and the geographic stability of brood distributions. Annals Of The Entomological Society Of America 94:386-399.
Marshall, D. C., J. R. Cooley, R. D. Alexander, and T. E. Moore. 1996. New records of Michigan Cicadidae (Homoptera), with notes on the use of songs to monitor range changes. Great Lakes Entomologist 29:165-169.
Simon, C. 1988. Evolution of 13- and 17-year periodical cicadas. Bulletin of the Entomological Society of America 34:163-176.