Bui. 3 1 , Biological Surve/. U. S Dept of Agriculture. 



Plate V. 



"D 

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 > 



H 



33 



n 

 m 



c 



33 



rn 

 D 



CD 

 ■< 



> 



D 

 O 



O 



m 



31 



P 



"1 

 > 



73 



r 

 m 



H 

 33 

 m 

 m 



c 

 33 

 m 

 o 



03 



> 

 o 

 o 



o 

 m 



