Macropis steironema opaca Robertson, 1891

Yakima River oil-collecting bee



Taxonomy & Nomenclature

Synonym/s: Macropis steironematis opaca Robertson, 1891


Conservation Status

Last record: 1882 (sole record)


According to (Shepherd, 2005), the sole record of this species was in 1882, and was the basis of Robertson's description.



Morgan’s Ferry (along the Yakima River), Washington, USA


Biology & Ecology










Michener, Charles D. (1938). A Review of the American Bees of the Genus Macropis (Hymen., Apoidea). Psyche 45(2-3): 133-135.

Shepherd, M. D. (2005). Species Profile: Macropis steironema opaca. In Shepherd, M. D., D. M. Vaughan, and S. H. Black (Eds.). Red List of Pollinator Insects of North America. CD-ROM Version 1 (May 2005). Portland, OR: The Xerces Society for Invertebrate Conservation.

Tepedino, V. J. and Griswold, T. L. (1995). The bees of the Columbia Basin. Final report, USDA Forest Service, Portland, OR. 212 pp (Technical Report).


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