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Genus Osmia - Mason Bees

Phylum Arthropoda - Arthropods
Class Insecta - Insects
Order Hymenoptera - Ants, Bees, Wasps and Sawflies
No Taxon Aculeata - Bees, Ants, and other Stinging Wasps
No Taxon Anthophila (Apoidea) - Bees
Family Megachilidae - Leaf-cutter bees, Mason Bees, and allies
Subfamily Megachilinae
Tribe Osmiini
Genus Osmia - Mason Bees

No Taxon Subgenus Acanthosmioides
Species integra - Osmia integra
No Taxon Subgenus Cephalosmia
Species montana - Osmia montana
Subspecies quadriceps - Osmia montana quadriceps
No Taxon Subgenus Helicosmia
Species caerulescens - Osmia caerulescens
Species chalybea - Osmia chalybea
Species coloradensis - Osmia coloradensis
Species georgica - Osmia georgica
No Taxon Subgenus Melanosmia
Species bucephala - Osmia bucephala
Species simillima - Osmia simillima
No Taxon Chenosmia group including very bright metallic green or blue Osmia
Species aglaia - Osmia aglaia
No Taxon Subgenus Osmia
Species cornifrons - Hornfaced bee
Species lignaria - Blue orchard bee
Subspecies lignaria - Osmia lignaria lignaria
Subspecies propinqua - Osmia lignaria propinqua
Species ribifloris - Osmia ribifloris
Species taurus - Osmia taurus
No Taxon cornifrons or taurus