DWELLINGS. 



191 



marvel of industry. They first make with grass a 

 sloping roof, giving it the form of a mushroom or an 

 open umbrella, and they place it in such a way that 

 it is supported by the trunk of a tree and one or two 



Fig. 29. 



of the branches. (Fig. 29) This thatch is pre- 

 pared with so much care that it is absolutely im- 

 penetrable to water. Beneath this protecting shelter 

 each couple constructs its private dwelling. All the 

 individual nests have their openings below, and they 



