Smithsonian Report, 1930. — Chapman 



Plate 4 





mM. 



Nests of Zarhynchus showing openings and methoii of ntlacluneni to siie. Tl.e nest at tlie left is from 

 the tree that fell shortly after the laboratory clearing was made; the one at the right is from the 

 sand-box tree. The former is believed to have been better adapted to the builders' needs 



