24 



CIRCULAR 6 4 3, U. S. DEPARTMENT OF AGRICULTURE 





—25 









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—25 



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1936 

 4^ 



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—1,600 







1937 













—1400 



















—1200 



















— 1 ; 000 



















—800 



















—600 

















111 



CD 



















D 

 2 



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I 











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— 200 







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— 



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J. 





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—300 







1935 











—200 

















—100 













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—30 



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, J 









. 









1936 











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i 







— 







1937 











— 100 

















— 50 



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M%m 









.1 ..... . 



. 



MAR. 



APR. 



MAY 



JUNE 



JULY 



AU6. 



SEPT. 



OCT. 



Figure 11. — Seasonal flight of Peridroma margaritosa saucia (A) and Protoleucania 

 albilinea (23) at Manhattan, Kans., 1935-37. 



