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cultivated crops. These small areas oi' native sod pasture are bound to be 
influenced by adjoining crops. Therefore, they, are treated as distinct from 
open-range grasses, ; . • 
Many collections were made along roadsides bordering two or more dis- 
tinct types of vegetation. These roadsides contain e. mixture of native grass- 
es and weeds, with somewhat similar flora throughout. Because of this* similari* 
ty, they are considered as a distinct habitat. Many farms contain waste land 
and weedy pastures covered with grasses and weeds. Those are also considered 
as a distinct environment and are called weedy patches. 
Most of the crops in the drought-stricken areas were destroyed early 
by the lack of moisture. Such heavy stands of pure Russian-thistle had sprung 
up that the original crops .cquld not be recognized. There were thousands of 
acres' of Russian-thistle mats all over. the Dakotas. These were also treated 
as representing a separate •environmental "condition, 
DISTRIBUTION BY STATES OF THE GRASSHOPPERS IN TYPICAL ENVIRONMENTS 
The distribution for each State of the species in each of the ten en- 
vironments and the frequency, with which each specdes' occurs .are shown in' tables 
1 to 10, The distribution is given in terms of percentage of the total number 
of specimens collected in each habitat. The species are listed and their rela- 
tive abundance given for each of the ten environments. ..in. all the districts. 
Certain habitats are not listed. for all States and districts. In some 
habitats sucL as corn and flax environments, - the crop was of minor importance 
in certain regions. Practically no low-mountain grassland occurs in North 
Dakota and some of the other districts. In other places, collections were not 
made along roadsides and in pastures. Therefore, there are gaps for the dis- 
tricts where certain environments were not considered. 
