Six Osmia simillima females used communal nest entrances to gain access to their nests in a piece of buried wood. Some nest characteristics are described.
"Use of Communal Nest Entrances by Osmia Simillima (Hymenoptera: Megachilidae),"
The Great Lakes Entomologist: Vol. 26
, Article 10.
Available at: http://scholar.valpo.edu/tgle/vol26/iss1/10