first to third instar, and accounting for approximately 25 percent 
of the infestation. 0. en igma , in first to fourth instars, ranges 
from 5 to about 50 P er square yard. 
MORMON CRICKET ( Anabrus simplex Hald. ) 
South Dakota. B. M. Gaddis and assistants (April 27 -May }) i Second- 
instar Mormon crickets were reported at the Lower Brule Indian Agency 
in Lyman County in the south-central part of the State on May 1. Light 
populations of- second- and third-instar crickets are reported in range- 
land areas ir. southeastern Mellette and northeastern Todd Counties. 
(May ii— 3.0 ) : 'Small numbers of Mormon cricket nymphs have been f ound 
in' Hand, Spink. Faulk, -bk’n. worth, and Campbell Counties, of 
central South Dakota 0 Cons: dor able numbers of third- and fourth-instar 
nymphs wore reported in Lyman County. (May 11-17) : Fifth- ins bar 
crickets arc reported present in Lyman Comity. Populations range from 
8 per square yard in Jones County to 150 per square yard in Lyman 
County. Between Reliance and Presho and on the Lower Brule Indian 
Agency, migrations are occurring. 
H. C. Scvorin and G. I* Gilbertson (May 23)1 Mormon crickets began 
to- hatch in the latter part of April and are now in the fourth or 
fifth instars 0 Definite banding is taking place. Considerable dam- 
age done to gardens in the Kennebec area. 
Montana,. B. M. Gaddis and assistants (May 4-10): Mormon crickets in the 
Slack Butte, Geraldine, and High wood Mountain areas of Chouteau County 
and in the Dover area of Judith Basin Comity in the central part of 
the State are in first to. third instars. In Big Horn County in the 
southern part of the State migrations of third- and fourth-instar 
crickets have occurred in the Sioux Pass area, while bands of first-, 
second-, and third-instar crickets in that area hare migrated very 
little. Cool weather ha„s retarded development and migration of 
crickets in Yellowstone County. A check of the infested area of 
Meagher County showed crickets just beginning to hatch on May 9, with 
only first-instar nymphs found. (May 11-17) s Nymphs arc reported in 
the third, fourth, and fifth instars in Yellowstone County and migra- 
tions are becoming noticeable. A heavy infestation is present on the 
Beaverhead Rational Forest , Beaverhead County, in the southwestern part 
' of the State. 
H. B. Mills ( May 20): Mormon crickets are reported hatching in 
Bighorn, Cascade, Chouteau, Meagher, Sanders, Yellowstone, and Beaver- 
head. Counties in the western half of the State. In the southern area 
some have reached the fourth instar, 
Wyoming. 3. M. Gaddis and assistants (April 21-26): Mormon crickets in 
Sheridan County, in the north-central part of the State, rare in the 
second and third instars, with most of them in the second. First- 
instar crickets are reported in Crook County, in the northeastern part 
of the Stake. Crickets are still hatching at the lower elovakions in 
Hot Springs County, in the northwestern part of the State. 
