the world > animals > invertebrates > phylum Arthropoda > class Insecta > order Hymenoptera > [noun] > suborder Apocrita, Petiolata, or Heterophaga > group Aculeata (stinging) > superfamily Apoidea (bees) > member of family Megachilidae (leaf-cutter) > of genus Osmia or Chalicidoma (mason-bee) (1)
any of various solitary bees of the family Megachilidae, esp. of the genera Osmia and Hoplitis, which construct nests of sand and other particles…