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WYOMING 
This is the fifth year in which collections were made in this State 
during the adult survey, the other 4 surveys having “been made in the years 
1934-37, inclusive. Wyoming is one of the 4 original States in which the 
project was started. Better and larger collections have Been made here 
than in any other State. There wore 35,703 specimens collected in 10 dif- 
ferent environments, with 52 species represented. Mclano plus nexicanus was 
by far the dominant species in ndst environments and in the total number of 
specimens collected. It comprised over half the hoppers in small grain, 
corn, and idle land and na.de up 29 percent of those on the range land. 
M. femur- rub run was second in numbers in most pianos and dominant in sugar 
beets and beans at 36 and 35 percent, respectively. Beginning in 1935, II, 
n exicanus has held about the same relative position as to its importance in 
crop land. C annul a pellucida from second in numbers has fallen off to fifth . 
place during this time. Aulocara elliot ti and Ageneotettix deorun gave way 
to M. nexicanus on the range, because of the large flights of this latter 
species into e'astern Montana in July and August. M. bivittatus remains an, 
about the sane relative position in 1938 as in other years. 
There was a small hatch of M.‘ bivittatus the third week of April and 
adverse weather conditions from then on retarded hatching and development 
and reduced populations. General hatching began during the first week of 
May. Adults of h. nexicanus and I vh bivi ttatus began to appear between June 1 
and 15. During the first part of July, major flights of M. mexicanus moved 
into all the eastern tier of counties from South Dakota. These flights cause 
major losses of crops and changed the local picture of 1939. There is little 
doubt that the grasshopper problem would have been reduced for 1939 if it had 
not been for these flights. Some heavy egg deposition took place in crop 
and idle land and a few adjacent areas of range land. Egg pod counts ran as 
high as 15 and 20 per square foot, with such averages as 4 per square foot 
for an entire county. This is equal to the egg counts made in the worst 
areas in South Dakota in the fall of 1937, where the major flights originated 
the summer of 1938. The extreme eastern counties present a distinct problem, 
not only from the standpoint of local crop protection but also from the stand- 
point of preventing a recurrence of major flights that night move into the 
irrigated sections of northern Colorado. 
