TWENTY-SEVENTH REPORT OF STATE ENTOMOLOGIST 



23 



Forks, and Sidney, indicating a general distribution throughout 

 the State. They have appeared in outbreak numbers, however, 

 only twice, first in Big Horn County in 1915, and second in an 

 area centering about Sidney in 1937. 



The pest was noticed first in the Sidney area on about the 

 5th of July, 1937. Some time before, the adults had been seen 

 flying in considerable numbers. The caterpillars hide during the 

 most of the day beneath clods, matted vegetation, and other pro- 



<y 



■ 



i 



Figure 8. — Army worms (Cirphis unipunctata Haw.) at the edge of an 

 irrigation ditch, Richland County, 1937. 



tection, coming out toward the middle of the afternoon. They 

 take bait readily in the afternoon when they start to feed. 



The methods of control used in the Sidney area in 1937 

 were: 



1. Poison bait spread about 4 p. m. This bait consisted of 

 the following ingredients: 



