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UTAH 
This is the fourth consecutive year in which collections of grass- 
hoppers were made in typical environments during the adult survey. Thero 
were 7,632 specimens collected in 10 environments and 38 species were 
represented in these collections. There was so little difference between 
the numbers of Mol ano plus mexicanus and M. femur- rub rum that these 2 species 
could be considered as sharing first place in the economic importance of. the 
different species. M. mexicanus was first in numbers in alfalfa, corn, idle 
land, and the total numbers of specimens collected. M. femur- rub rum was 
first in numbers in pasture, salt, marsh, small grain, clover, miscellaneous' 1 
margins, and miscellaneous crops.. Opeja obscura and Trachyrachis kiowa were 
first in numbers on the range*: according to the collections, although this 
statement is based on only 118 specimens. M. packer dii was next in numbers 
in the total number of specimens collected. In the 1935 collections, M. 
mexicanus and M, femur- rubrum held about the same relative positions in 
numbers as in the 1938 collections. Then in 1936, M. femur- rubrum became 
more numerous than M. mexicanus , until in 1937 it was the dominant grass- 
hopper in all environments, forming 69 percent of the total number of speci- 
mens collected. In the 1938 collections for Utah, M. femur- rub rum resumed' 
about the same relative position with M. mexicanus as in 1935. 
Hatching of grasshoppers began about the middle of April and was 
prolonged throughout June because of unfavorable weather conditions. The 
populations as a whole are down and control is confined mainly to irrigated 
fields and especially to seed alfalfa. Hoppers on adjacent range land give 
considerable trouble to the growers of seed alfalfa, especially when the 
range dries up. Relatively small numbers can destroy a great deal of seed 
and, therefore, a valuable crop. 
