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April 27, 1907


JAMA. 1907;XLVIII(17):1438-1439. doi:10.1001/jama.1907.02520430050010

It has long been known that mosquitoes hibernate during winter, and are thus preserved from season to season. In view of recent experiments conducted by Passed Assistant Surgeon Francis1 of the Public Health and Marine-Hospital Service, it appears very probable that the Stegomyia calopus is also preserved in another way, thus in two ways being able to survive a southern winter. Francis collected eggs of this genus of mosquito in Mobile, Ala., Aug. 16, 1906, and preserved them in the dry state at practically outdoor temperatures until Feb. 27, 1907, a period of six and one-half months. Water was then added, and the eggs developed into adult mosquitoes; these in turn laid eggs which hatched into larvæ, thus completing the life cycle. The length of time stegomyia eggs can withstand desiccation has been variously stated. Theobald mentions two months.2 Reed and Carroll3 kept them for ninety days

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