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Species Megachile rotundata - Alfalfa Leafcutter

bee - Megachile rotundata Bee - Megachile rotundata - female Small Leafcutter Bee - Megachile rotundata - male Lasioglossum ? - Megachile rotundata Megachilidae? - Megachile rotundata Small Solitary Bee - Megachile rotundata is this Megachile rotundata? - Megachile rotundata - male Bembix Sand Wasp?  Pale legs & Pale Eyes - Megachile rotundata
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, 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)
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.