The author investigated nest cells of Dasypoda hirtipes and Panurgus calcaratus in the summer of 2008 and spring of 2009. He summarizes methods and tools used to excavate and conserve nest cells and pollen balls. He describes the nest structure, nest cells and food supply of Dasypoda hirtipes. For Panurgus calcaratus he merely describe nest cells and food supply. How the larvae overwinter and later pupate is described for both species; there are also some differences with bees that pupate before the winter