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Tribe Megachilini - Leafcutter, Resin, Mortar, and Sharptail bees

Mystery Bee - Megachile - female bee on butterfly weed - Megachile xylocopoides - male Megachile (Sayapis?)  - Megachile - male Mating flies? [note: actually bees] - Coelioxys sayi - male - female Bees feeding another in Palo Verde tree - Megachile Megachile - Megachile rotundata Megachilidae - Megachile - male Leafcuter Bee - Megachile pruina? - Megachile - 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)
Numbers
>170 spp. in 2 genera in our area, >2000 spp. in 5 genera worldwide(1)
Range
worldwide(1)