Magicicada septendecim, sometimes called the Pharaoh cicada or the 17 year locust, is native to Canada and the United States and is the largest and most northern species of periodical cicada with a 17-year life cycle.
Like other species included in Magicicada, the insect's eyes and wing veins are reddish and its dorsal thorax is black. It is distinguished by broad orange stripes on its abdomen and a unique high-pitched song said to resemble someone calling "weeeee-whoa" or "Pharaoh," features it shares with the newly discovered 13-year species Magicicada neotredecim.
Because of similarities between M. septendecim and the two closely related 13-year species M. neotredecim and M. tredecim, the three species are often described together as "decim periodical cicadas."
Historical accounts cite reports of 15- to 17-year recurrences of enormous numbers of noisy emergent cicadas ("locusts") written as early as 1733. Pehr Kalm, a Swedish naturalist visiting Pennsylvania and New Jersey in 1749 on behalf of his nation's government, observed in late May one such emergence. When reporting the event in a paper that a Swedish academic journal published in 1756, Kalm wrote:
The general opinion is that these insects appear in these fantastic numbers in every seventeenth year. Meanwhile, except for an occasional one which may appear in the summer, they remain underground.
There is considerable evidence that these insects appear every seventeenth year in Pennsylvania.
Kalm then described documents (including one that he had obtained from Benjamin Franklin) that had recorded in Pennsylvania the emergence from the ground of large numbers of cicadas during May 1715 and May 1732. He noted that the people who had prepared these documents had made no such reports in other years. Kalm further noted that others had informed him that they had seen cicadas only occasionally before the insects appeared in large swarms during 1749. He additionally stated that he had not heard any cicadas in Pennsylvania and New Jersey in 1750 in the same months and areas in which he had heard many in 1749. The 1715 and 1732 reports, when coupled with his own 1749 and 1750 observations, supported the previous "general opinion" that he had cited.
Based on Kalm's account and a specimen that Kalm had provided, Carl Linnaeus gave to the insect the Latin name of Cicada septendecim in the tenth edition of his Systema Naturae, which was published in Stockholm in 1758.
In 1775, Thomas Jefferson recorded in his "Garden Book" the insect's 17-year periodicity, writing that an acquaintance remembered "great locust years" in 1724 and 1741, that he and others recalled another such year in 1754 and that the insects had again emerged from the ground at Monticello in 1775. He noted that the females lay their eggs in the small twigs of trees while above ground.
In April 1800, Benjamin Banneker, who lived near Ellicott's Mills, Maryland, wrote in his record book that he recalled a "great locust year" in 1749, a second in 1766 during which the insects appeared to be "full as numerous as the first" and a third in 1783. He predicted that the insects "may be expected again in the year 1800, which is seventeen years since their third appearance to me".
- World Conservation Monitoring Centre (1996). "Magicicada septendecim". IUCN Red List of Threatened Species. Version 2.3 (2.3). International Union for Conservation of Nature. Retrieved August 10, 2007.
- Alexander, Richard D.; Moore, Thomas E. (1962). "The Evolutionary Relationships of 17-Year and 13-Year Cicadas, and Three New Species (Homoptera, Cicadidae, Magicicada)" (PDF). University of Michigan Museum of Zoology. Retrieved 9 June 2011.
- Stranahan, Nancy. "Nature Notes from the Eastern Forest". Arc of Appalachia. Retrieved 10 June 2011.
- "Periodical Cicada Page". University of Michigan. Retrieved 10 June 2011.
- Marlatt, C.L (1898). The Periodical Cicada in Literature. The Periodical Cicada: An Account of Cicada Septendecim, Its Natural Enemies and the Means of Preventing its Injury, Together With A Summary of the Distribution of the Different Broods (Bulletin No. 14 - New Series, U.S. Department of Agriculture, Division of Entomology). Washington, D.C.: United States Government Printing Office. pp. 112–118. OCLC 10684275.
- Dudley, Paul (1733). Periodical Revolutions. Additional Manuscripts 4433, Folios 4-11, Division of Manuscripts of the British Library, London. Cited on page 49 of Kritsky, Gene (2004). Hoffmann, Nancy E. and Van Horne, John C, eds. John Bartram and the Periodical Cicadas: A Case Study. America's Curious Botanist: A Tercentennial Reappraisal of John Bartram 1699-1777. Philadelphia, Pennsylvania: The American Philosophical Society. pp. 43–51.
Moreover, the first time the Society had heard about periodical cicadas was from Paul Dudley, who sent a manuscript to the Society in 1733. .... Dudley correctly noted the seventeen-year life cycle and provided evidence. However, Collinson's paper shows that he used Bartram's claim of a fifteen-year cycle in his paper.
- Davis, J.J. (May 1953). "Pehr Kalm's Description of the Periodical Cicada, Magicicada septendecim L., from Kongl. Svenska Vetenskap Academiens Handlinger, 17:101-116, 1756, translated by Larson, Esther Louise (Mrs. K.E. Doak)". The Ohio Journal of Science. 53: 139–140. Archived from the original (PDF) on 2012-10-02. Republished by Knowledge Bank: The Ohio State University Libraries and Office of the Chief Information Officer. Retrieved 2012-10-02.
- Linnaei, Caroli (1758). Insecta. Hemiptera. Cicada. Mannifera. septendecim. Systema Naturae Per Regna Tria Naturae, Secundum Classes, Ordines, Genera, Species, Cum Characteribus, Differentiis, Synonymis, Locis. 1 (10th ed.). Stockholm, Sweden: Laurentii Salvii. pp. 436–437.
- Jefferson, Thomas (1775). Betts, Edward Morris, ed. Thomas Jefferson's garden book, 1766-1824, with relevant extracts from his other writings. Thomas Jefferson Foundation, Inc. (2008). p. 68. ISBN 1-882886-11-9. OCLC 836062827.
Dr. Walker sais he remembers that the years 1724 & 1741 were great locust years. we all remember that 1758 was and now they are come again this year of 1775. it appears that they come periodically from the ground once in 17 years. they come out of the ground from a prodigious depth. it is thought they eat nothing while in this state, laying their eggs in the small twigs of trees seems to be their only business. The females make a noise well known. The males are silent.
- (1) Latrobe, John H. B., Esq. (1845). Memoir of Benjamin Banneker: Read before the Maryland Historical Society at the Monthly Meeting, May 1, 1845. Baltimore, Maryland: Printed by John D. Toy. pp. 11–12. OCLC 568468091. Retrieved 2015-10-07. At Google Books
(2) Barber, Janet E.; Nkwanta, Asamoah (2014). "Benjamin Banneker's Original Handwritten Document: Observations and Study of the Cicada". Journal of Humanistic Mathematics. 4 (1): 112–114. doi:10.5642/jhummath.201401.07. Retrieved 2014-08-26.
- Media related to Magicicada septemdecim at Wikimedia Commons
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