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WYOMING 
All of the collections were made in either the short grass or 
northern desert shrub areas. The natural vegetation areas in this State 
are subdivided as follows (the mountain regions are not included): 
1 . Northern desert shrub or sagebrush area: 
All of the State west of the Laramie and Big Horn Mountains except 
the mountain areas. 
2. Short-grass region : 
(a) Grama grass— most of the extreme eastern part of Wyoming to the 
Black Hills and down the eastern border. 
(b) Western wheatgrass and sagebrush — a strip just east of the 
Big Horn Mountains. 
(c) Grama and mountain sage — a narrow strip fronting the eastern 
slope of the Big Horn and Laramie Mountains. 
There were 4,385 specimens in the collections mostly from alfalfa. 
Six habitats are represented and 42 species were taken. Melanoplus 
mexicanus was dominant, with Camnula pellucida a close second. It was 
only in this State that M. bivittatus was at all numerous. It ranked 
third. Practically all the collections were confined to the northern 
counties. 
The infestations were mostly limited to the six northern counties. 
Outside of these there were few and light infestations. The distribution 
of the species was about the same in the crops. In the plains grassland 
C. pellucida was dominant in 1935 at 23 percent and a minor species at 
60 percent in 1934. This was the greatest change. 
