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Species Megachile rotundata - Alfalfa Leaf-cutter Bee

Subfamily Megachilinae Megachile rotundata - Alfalfa Leafcutter Bee - Megachile rotundata Alfalfa Leafcutter Bee - Megachile rotundata - female leafcutter on  mountain mint - Megachile rotundata - female hymenoptera 1 - Megachile rotundata Small Leafcutter Bee - Megachile rotundata - male Small Solitary Bee - Megachile rotundata Bembix Sand Wasp?  Pale legs & Pale Eyes - Megachile rotundata leafcutter bee with white abdominal bands - Megachile rotundata - female
Classification
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)
Species rotundata (Alfalfa Leaf-cutter Bee)
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)
Size
Female 8-9 mm. Male 7-8 mm.
Identification
Narrow white sternal hair bands.
Range
Almost worldwide.
Season
It flies in June, July and August.
Food
The Hosts section on its Discover Life species page lists known floral associations based on specimen records and images.
Remarks
Introduced from the Old World sometime after the 1930s.