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In order to shorten the discussion of the grasshoppers found in each 
of the environments selected in Montana, North Dakota, South Dakota, and 
Wyoming, the most abundant species have been listed, together wi-th their per- 
centages of the total number of specimens, collected in. each environment. The 
percentages are expressed in round numbers. 
Small grain 
Legumes 
Percent 
1. Melanoplus mexicsnus 43 
2» Camnula pelluci da ■ 17 
3« Melanoplus femur - rubrum 9 
4» Melanoplus packardii 4 
5» Melanoplus bivittatus 3 
b. All others 24 
Corn 
1. Melanoplus mexicanus 27 
2, Melanoplus femur-rubrum 11 
3» Ageneotettix deorum 10 
4* Melanoplus gladstoni 7 
5« Melanoplus d ifferential is- - b 
6. All others ' 39 
Roadside 
1* Melanoplus mexicanus 32 
2 # Camnula p ellucida l8 
3» Ageneotettix deorum 8 
4» Melanoplus differentials — 7 
5« Melanoplus packardii b 
b. All others 29 ' 
Russian- this tie 
1# Me lanoplus mexicanus 60 
2» Melanoplus femur-rubrum 6 
3» Ageneotettix deorum 5 
4» Melanoplu s p ackardii 5 
E). Melanoplus angustipennis 4 
b. All others '--- 20 
Low-mountain gra s sland 
1. Melanoplus mexicanu s 2^ 
2» Camnula pellucida 20 
3* A geneotettix deorum- - lo 
4« Mestobregma kiowa 4 
5* Drepanopterna femoratum 4 
b» Phi ibo stroma quadrimaculatum 4 
7, All others 27 
•: Percen t 
1, M elanoplus mexicanus 37 
2, Melanoplus femur-rubrum- 25 
3« M,ela noplus packardii — ' 7 
4. Camnula pellucida ■ 5 
5« Ageneotettix deorum 5 
b. All others 21 
» 
I-. Melanoplus mexicanus 31 
2. i\ T elanoplus femur-rubrum 24 
3. C amnula pell u cida 21 
4» Melanoplus bivittatus 5 
5* Melanoplus packardii 4 
b. . All. others 15 
Weedy patches 
1. Melanoplus mexicanus 39 
2, Ageneotettix deorum 10 
3» Phlibostroma quadrimaculatum 9 
4* Melanoplus femur- rubrum . o 
5» Phoetaliotes nebrascensis 5 
0. All" others ~$1 
Plains grassland 
1. Ageneotettix d eor um 23 
2. Melanoplus mexicanu s 14 
3» M estobregma kiow a 13 
4. Phlibostroma quadrimaculatum 9 
5. Drepanopterna femoratum 
o* Oneia obscura 7 
7. All others 2b 
Pasture grassland 
1« Mesto bregma kiowa- - 4^ 
2. Ageneotettix deorum 29 
3» Melanoplus mexicanus — o 
4» Phlibostroma qua dr ;ma cula turn 4 
5* Melanoplus femur- rubrum 3 
b. Ill others lo 
