90 



ANIMAL BIOLOGY 



horn's " Birds and their Relation to Man," Forbush's 

 " Useful Birds and their Protection," Hornaday's " American 

 Natural History," pamphlets of Department of Agriculture 

 (which may be obtained free from Washington, D.C., and 

 from State Departments of Agriculture), and articles on 

 birds and insects in Encyclopedias. 



