^233- 
districts* Oonsidora'ble marginal dnniago is occurring in alfalfa and 
grain in'Weler Oonnty, Popul.ations in Hich and Summit Counties are 
very low* Hatlicr severe infestations were found in several localities 
in Box Elder County. 
1 / , 
Idalio. . (June S-14} : Ecatcliing of the economic species of grasshoppers, 
except for pollucida , is complete in the ecO-stern counties; eggs of 
this species ha,vc not "begun to hatch. Populations otq not heavy. 
1 / 
MOEMOH CEIOKBl ( Ana"brus simplex Kald*) 
South Dakota.* (June 1— 7)i Mormon crickets in Lyman, Jones, and Mellette 
Counties are sca.ttering and little migration is evident* Most crickets 
are now in the sixth— and seventh-instar and adult stages. In an 
area "between Presho and Oacoma in Lyman County, considerable num"bers 
of crickets are present in small-grain fields, particularly along margins 
where coiuits range as high as 50 to 60 per square yard, 
lTe"bra,ska* H, D, Bate (June 20): Some third- and fourth-instar crickets 
vjere found in Scotts Bluff County on June 4, 
i/ 
Montana* (May 25— 3l)j Increased migrations occurred in the Sioux Pass 
area of Big Horn County during the week. Populations in the Black 
Butte area in Chouteau County range from 2 to 25 per square ya,rd, 
v;ith approximately 75 percent in the ^th instar* In Beaverhead County 
crickets in 'the lower altitudes range from the third to sixth instars, 
with most in the fourth, ^irhile in the higher areas they range from, 
first to third, and unhatched eggs are still xoresent. Populations range 
from 100 to 3OO crickets per square yard, (June S-l4) : Migrations 
have increased in Yellowstone Coiinty following the recent rains and 
some infiltration into croplands has occurred; hov/ever, there has "been 
little damage to crops* Adults are no‘w appearing in the Pryor and Ply 
Creek areas, 
, 1/, 
Idaho, (June S-l4) ; Cricket migrations were occurring generally d.uring 
. the week tliroughout the eastern part of the State, In Jefferson and 
Madison Counties, they occurred. sim.ultaneously in three separate areas 
originating in the area roughly "bounded by the towns of Hamer, Roberts, 
and Rexburg, Cricket migrations in Clark and Premont Counties also 
wore quite extensive, Bho range of development of Mormon crickets 
in the eastern part of the Sta,to is from the sixth instar to the adult 
stage, v;ith SO percent adu3.t; approximately 5 percent of the femades 
have developed eggs. Populations in migrating bands ranged from 5 
50 per square yard* 
Utah* D. D. Jorgensen (June); Mormon crickets occur in an area of several 
miles in southeastern Booele County, where the most heavily infested 
areas are in the Onaqui Range, Judd Creek, Government Creek, Simpson 
Springs, and northe \.stern Juab County, in the mountains just south 
of Eureka* Bands range in size from 2 to 5 acres. One band at 
Ballyii/ay Canyon, Booele County, was 3/^ mile long and m.orc than a 
mile wide* By Juno 20, 10 percent were adudt, but no mating had 
been observed. Ho severe crop injury has occurred* Range feeding 
has been common* 
