TWENTY-SIXTH REPORT OF STATE ENTOMOLOGIST 



13 



fields. The Yellow-winged, or Warrior, locust is more local in its distribu- 

 tion, often occurring in immense numbers in restricted localities and at times 

 becoming very injurious to grasses and grains. 



Figure 1. — The big-headed grasshopper (Aulocara elliotti), the domi- 

 nant species on the range in Montana. 



It will be seen by comparing Professor Cooley's remarks 

 with table 3 that conditions today are much the same as in 1903. 

 We have now and probably always have had a more complicated 

 situation on our range than apparently obtains at the present 

 time in British Columbia. It should be remembered as well that 

 our range has been the breeding ground from whence have come 

 some of the great historical grasshopper outbreaks. It made up 

 a large part of the primary breeding territory of the notorious 

 Rocky Mountain Migratory locust which laid waste a large part 

 of the middle west some sixty years ago. We are forced to as- 

 sume that for generations past this territory has been very fa- 

 vorable at times, and not infrequently, to the development of 

 grasshoppers which in number and variety have been equalled 

 by few other areas in the world. 



In order to successfully prosecute a program built around 

 the idea of the prevention of grasshopper outbreaks on the range 

 the following factors important and necessary thereto may be 

 summarized as follows: 



1. The program would have to include cultivated land as 



