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SOUTH DAKOTA 
This is the sixth year in which collections have "been made in 
South Dakota, A total of 12,043. specimens were taken' in 10 habitats, 
with 65 species included in the collections. Melanoplus mexicanus was 
the dominant species in l5 out of the 10 habitats and in the total number 
of specimens collected in the State. Ageneotettix deorum was second in 
lumbers, being the most numerous of all specimens taken in 3 out of the 
10 environments. Collections were made too late to get representative 
numbers of M, bivittatus and it may have been equal in numbers to M. 
dif f erent iali s . v/hich was third in relative abundance. M, mexicanus 
' has decreased in relative abundance and Ageneotettix deorum has greatly 
increased. The heaviest infestations are in the eastern and south- 
central parts of the State. I’lights out of the Black Hills section, 
in the western part of the State, greatly reduced populations there. 
