' -4o4~ 
an area of 3*000 acres, one- third. : of which is cropped land* Popula- 
tions in alfalfa fields' average 60 per square yard, with populations 
along ditch hands and small grain margins running as high as 25O per 
square yard. The grasshoppers are 95 percent adult. M. hivittatus , 
M. packardii , and M. mexicanus , approximately equal in numbers, 
comprise populations in the central and west-central arca,s of Utah.. 
Seventy-five percent arc adults in areas visited during the week. 
Mating of M. packardii and M. mexi canus was observed over wide areas. 
0. enigma and Aulocara elliotti Thos., two of the more important 
species in ITephi Talley of Juab County, are 95 percent adult and 
mating was observed. (July 12): Heavy infestations were found in 
Sanpete Counts’-, where M. mexicanus represents SO percent and C5. pellucida, 
10 percent. Severe damage to alfalfa was observed at Fountain Green, 
where 100 percent leaf stripping was noted on several large fields. 
-An extremely heavy infestation of < C. pellucida was found in the meadow 
lands extending from Ephraim to Manti, where 'hoppers were estimated to 
number from 4o to ^00 per square yard. In Tooele County heavy popu- 
lations were found, M. mexicanus representing SO percent and M. bivit- 
tatus 10 percent. Alfalfa fields in infested areas were found to 
have populations ranging from 10 to 40 per square yard, with a field 
average of 20 per square yard. In general, damage is confined to the 
margins, although 25-percent stripping of leaves was observed on 
several fields in Skull Talley, Wheat fields planted under thorough 
cultivation practices were relatively free. 
Montana. 3. M. Gaddis (July 13—19)* M* mexicanus comprised approximately 
SO percent and M. bivitta.tus 20 percent of the populations throughout 
most areas of souths central Montana. In Sweet Grass . County, 
M. bivittatus constituted about SO percent of the populations and in 
northeastern Yellowstone County M. mexicanus ma.de up almost 100 percent. 
M. bivitta.tus and M. mexicanus comprised most of the population in 
northeastern Montana* 25 percent being in the adult stage. In the 
north:- central counties of Chouteau, Cascade, Judith Basin, Pondera., 
and Teton, most of the ^hoppers wore adult. Light flights moving 
west were reported over Dutton, in Teton County, on July l4 and moving 
north over Havre, in Hill County, on July 19* 
Wyoming. B. T. Snipes (July 22): Heavy infestations of M. bivittatus , 
M. f omur-rubrum , and M. packardii are present in parts of Park, Big 
Horn, Washakie, • Fremont, and Sheridan Counties. Many are adult and 
mating and egg deposition have begun in most localities. M. bivittatus 
is the dominant species, with M. : femur - rubrum second in importance. 
B. M. Gaddis (July 6-12): A. turnbullii populations were present 
over wide areas of range land in Big Horn County, ranging from 2 to 6 
per square yard, with roadside- populations considerably heavier and 
■ 80 percent adult. Some marginal damage to sugar beets we„s reported in 
fields adjacent to range lands. A rather severe inf estation, 4- miles 
long and 2 miles wide, was reported in Fremont County. The dominant 
species was 0 , pellucida, , which comprised 60 xoercent of the popula- 
tions, 80 percent being adults. Field counts ranged from 12 to 50 
per square yard. (July 13-19)* M. bivitta.tus was the dominant species 
in Sheridan County, where approximately percent were adults. Rather 
