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A Note on Megachile centuncularis (Linn.) in Wisconsin (Hymenoptera: Megachilidae)

  • J. T. Medler
Extract

Records on Megachile centuncularis (Linn.) were obtained in connection with research on pollination of alfalfa in Wisconsin. At no time abundant, specimens were collected while tripping alfalfa flowers in Bayfield, Brown and Dane Counties. One bee tripped 95 per cent of the alfalfa flowers visitedand the earliest record was June 9th in Dane Co. Other flower records included fireweed, Epilobium angustifoliurn L., and goldenrod, Solidago sp. In Ontario, Pengelly (1953) found a female on sow thistle at Guelph, and observed a few specimens on alfalfa at Cayuga; alfalfa flowers were visited at the rate of 26-28 per minute and tripping efficiency was 99-100 per cent. Mitchell (1935) listed flower records that indicated a generalized habit, but the bee showed preference for composites

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References
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Crèvecoeur, M. A. 1952. Le psychisme des Hyménoptères vespiformes et mellifères. Bul. Ann. Soc. Ent. Belg. 88: 919.
Gentry, T. G. 1874. Notes on Megachile centuncularis. Can. Ent. 6: 171175.
Hicks, C. H. 1926. Nesting habits and parasites of certain bees of Boulder County, Colorado. Univ. Colorado Studies 15: 217–52.
Medler, J. T., and Koerber, T. W.. 1958. Biology of Megachile relativa Cresson in trapnests in Wisconsin. Ann. Ent. Soc. Amer. 51: 337–44.
Michelbacher, A. E., and Hurd, P. D. Jr., 1954. Monodontomerus montivagus Ashmead, a parasite of Megachile centuncularis (Linnaeus). Pan-Pacific Ent. 30: 146.
Mitchell, T. B. 1935. A revision of the genus Megachile in the Nearctic Region. Part III. Trans. Amer. Ent. Soc. 61: 155205.
Packard, A. S. 1869. (9th ed.) Guide to the study of insects. Holt and Co., New York.
Pengelly, D. H. 1953. Alfalfa pollination in southern Ontario. Ent. Soc. Ont. Rept. 84: 101–18.
Příhoda, Antonin. 1946. Calounice (Megachile) jako lesní škůdei. Lesnická Práce 25 (11/12): 373–81. (Original not seen.)
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The Canadian Entomologist
  • ISSN: 0008-347X
  • EISSN: 1918-3240
  • URL: /core/journals/canadian-entomologist
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