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



—1,000 









1934 













—500 













jiidJii^ 



1 



— Z50O 



























1935 













—2000 





















—1500 





















—1,000 





















—500 



,il 



uLk 

















—£500 





















—2000 









1936 













—1500 





















— 1000 





















—500 



J..k 





JUL, 







i 



1 



L 





—3500 



















—3000 



















—2500 









1937 











—2000 



















—1500 



















—1,000 













I 







—500 

 



- 1 



Mil i 







mk 



iJL 





MAR. 



APR. 



MAY 



JUNE 1 JULY 



AUG. 



SEPT.| OCT. 



NOV. 



Figure 4. — Nightly flight of Phalaenidac at Manhattan, Kans., 1934-37. 



