Proceedings, 1920. 



99 



'.ral Outbreak 



/ 5carcc 

 ral Outbreak 

 il Tidvaqcs 

 ' Scarce 



mo nee n-m 



Lasfcrn Ticqion 



16/0 mo 1630 KM leSC l&^O 1870 1660 1610 /90C 19/0 KO 



Ccntrol Hccj/on 



mo I76C 1790 IdOO 





r 



I J 



/6!0 /83C /(m 1850 leiU) 7670 1660 7690 /m 79/0 J9Z0 



ral Outbreak 



I T^avaqes 



Scarce 



rr70 /760 mo 7600 leio 7620 /eio tow /eso /eto lem /eso /&)0 fvo /970 /9^ 



'Story of tk forest Tent Caterpillar in /\/orffi fsmerlca . Tf/edcftted lines 

 indicntc the abundance of the meet. 



