Osmia caerulescens

Osmia caerulescens
	Female
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Family:	Megachilidae
Genus:	Osmia
Species:	O. caerulescens
Binomial name
	Osmia caerulescens; (Linnaeus, 1758)
Synonyms
	Apis caerulescens Linnaeus, 1758 ; Apis aenea Linnaeus 1758 ; Apis superbus Harrus 1776 ; Apis muraria Retzius 1783 ; Apis cuprea Geoffroy, 1785 ; Apis cyanea Fabricius 1793 ; Megachile cyanea (Fabricius 1793) ; Anthophora cyanea (Fabricius, 1793) ; Andrena cupraria Walckenaer 1802 ; Osmia purpurea Cresson 1864 ; Osmia rustica Cresson 1864 ; Osmia melanippa Spinola 1808 ; Osmia dutti Cockerell 1922 ;

Osmia caerulescens, the blue mason bee, is a species of solitary bee from the family Megachilidae. It has a Holarctic distribution extending into the Indomalayan region, although its presence in the Nearctic may be due to human-assisted introduction.