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).
The map above was generated from positive records in the Cicada Central Database on 31 December 2010. The database is not exhaustive, and this map is intended to portray only an approximate, present-day distribution.
The map below is based on previously published maps (Marlatt 1923; Simon 1988) and unpublished data.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:
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.
©2011