Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
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Family Megachilidae - Leaf-cutter Bees, Mason Bees, and allies

Megachilid Bee - Coelioxys sp. - Coelioxys - female Unknown bee - Anthidium manicatum Bee - Megachile sculpturalis Rear view of pollinator - Megachile texana Alfalfa Leafcutter Bee - Megachile rotundata - female 12101505-1 - Osmia Unknown Bee - Osmia Megachile - Megachile centuncularis - male
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 (Leaf-cutter Bees, Mason Bees, and allies)
Explanation of Names
From genus Megachile Latreille
>630 spp. in 18 genera of 4 tribes and 2 subfamilies in our area, ~4,100 spp. in ~80 genera of 11 tribes and 4 subfamilies worldwide(1)
Overview of our fauna (* –taxa not yet in the guide)
Family Megachilidae
Subfamily Megachilinae
6-18 mm
Most are of moderate size and stout bodies.
Front wings with two submarginal cells, abdomen with pollen-collecting basket ventrally, absent in parasitic species.(2)


Genus Lithurgus - Lithurge




worldwide and throughout NA(1)
Typically fields with flowers, etc.
Adults visit flowers for nectar. Larvae feed on pollen and nectar.
Life Cycle
Most are leaf-cutters, nesting in ground, in cavities, wood. Tunnels are bored in wood or in the ground. Cell is provisioned with pollen (and nectar?), an egg laid, and cell is sealed over with circular pieces of leaves that fit tightly into cavity. A few (Stelis, Coelioxys) are (clepto)parasitic, laying their eggs in the nests of other members of this family.
Internet References
Fact sheet by D. Serrano(3)
Mites that parasitize Megachilidae. Genus Chaetodactylus Rondani, 1866