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OKLAHOMA 
This is the second year in which collections were made in Oklahoma 
during the adult survey. In 1937 a special project was set up "by the 
entomology department of the A & M College at Stillwater, whereby collections 
of hoppers were made and classified in specified environments. These, added 
to the collections made hy surveyors in the adult survey, gave a complete 
picture of the distribution of species in the State that year. In 1938 
the regular surveyors made the collections and only about half as many 
were collected as in 1937. There were 4,820 specimens collected in 9 en- 
vironments and 53 species were represented. About 2 percent of the total 
specimens collected were undetermined nymphs. In everything but the range 
land the dominant species was I.Ielanoplus dif ferentialis . Outside of the 
Panhandle counties M. packardii was the most numerous species on the prairie. 
In the crop land M. differentials made up one-half of the grasshoppers. 
M. mexi canus was second only in the alfalfa, with M. packardii second in 
numbers for small grains and probably other crops. There seems to be little 
change in the relative numbers of the more important species. Aulocara 
elliotti docs not scorn to have been so numerous in 1938 as in 1937, but 
Acoloplus turnbullii has increased in importance. In the extreme western 
counties of the Panhandle, Di ssosteira longipennis moved in late in July 
and deposited eggs along fence rows of cropped areas and in the corn and 
sorghum stubble, as well as a small portion of the range land. 
Hatching of M. bivittatus and M. mexi canus began the last of March, 
adults of M. mexi canus being noted by the first week of May. Owing to con- 
tinuous rains, fungous and bacterial disease reduced the population. The 
grasshopper potential for the fall of 1938 is about half what it was in 1937. 
In 1939 the greatest trouble will probably be in the Panhandle area, where * 
D. longipenni s is dominant. 
