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Species Megachile rotundata - Alfalfa Leafcutter

Megachile ? - Megachile rotundata Megachile ? - Megachile rotundata Halictus? bee in catmint - Megachile rotundata - female Alfalfa Leafcutter Bee - Megachile rotundata - female Megachile - Megachile rotundata Small Leafcutter Bee - Megachile rotundata - male Bee - Megachile rotundata Potentilla Leafcutter - Megachile rotundata
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
No Taxon (Anthophila (Apoidea) - Bees)
Family Megachilidae (Leafcutter, Mason, and Resin Bees, and allies)
Subfamily Megachilinae (Leafcutter, Resin, Mortar, Sharptail, Mason, and Woolcarder bees and relatives)
Tribe Megachilini (Leafcutter, Resin, Mortar, and Sharptail bees)
Genus Megachile (Leafcutter and Resin Bees)
No Taxon (Subgenus Eutricharaea, Small Leafcutter bees)
Species rotundata (Alfalfa Leafcutter)
Other Common Names
Lucerne Leaf-cutter Bee
Synonyms and other taxonomic changes
Apis rotundata Fabricius, 1793
Apis pacifica Panzer, 1798
Megachile imbecilla Gerst├Ącker, 1869
Explanation of Names
Megachile pacifica (Fabricius, 1793)
Female 8-9 mm. Male 7-8 mm.
Narrow white sternal hair bands.
Almost worldwide.
It flies in June, July and August.
The Hosts section on its Discover Life species page lists known floral associations based on specimen records and images.
Introduced from the Old World sometime after the 1930s.