Periodical Cicadas







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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). Marlatt (1923) recorded Brood X in MO; however, current opinion on these records is that they date from a co-emergence of Broods 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).

Brown symbols on the map above were generated from verified records in the Cicada Central Database on 14 March 2016.
Blue symbols on the map are based on Marlatt (1923).

Gold symbols are based on Simon (1988); smaller symbols are records with a lower degree of certainty.

These records have not been field checked.

A project is currently underway to make new maps of periodical cicada broods. See the Magicicada mapping project homepage and the Geospatial Data Clearinghouse.
Cooley, J. R., G. Kritsky, J. D. Zyla, M. J. Edwards, C. Simon, D. C. Marshall, K. B. R. Hill, and R. Krauss. 2009. The Distribution of Periodical Cicada Brood X. The American Entomologist 55:106-112.
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 States 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.
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