DWELLINGS. 



201 



a small bee which lives in liberty in our climate. As 

 its name indicates, it prefers to frequent the walls of 

 old buildings and finds a refuge in the interstices, 

 hollowing out the mortar half disintegrated by time. 



-M0 41 



^ M. 



Fig. 34. 



The entrance to the dwelling is protected by a tube 

 curved towards the bottom, and making an external 

 prominence. (Fig. 35.) The owner comes and goes 

 by this passage, and as it is curved towards the earth 



