-797- 
. an estimate of 46,539 tons for 194l and on estimate of 118,157 tons for 1940, is 
indicative of ,. the ..general decline in grasshopper populations, (R, A. Shoals, 
.Bureau of Entomology and Plant Quarantine, U. S* D* A,) ...r 
• •. MORMON CRICKETS. — The size of the known infested area , in Idaho has more 
than doubled. This is due to the inclusion of a. large inf ested : area, in Owyhee 
County, which* wpS not surveyed last season* The infested areas are on valuable 
desert range land and in the vicinity of small hay ranges. In eastern Idbho 
heavy and moderate infestations near cultivated areas are still present. The 
total acreage in Montana known to be infested has increased, but heavy and mod- 
erate infestations are less extensive than were recorded in 1940. Heavy infesta- 
tions. are located in Beaverhead County, along the Idaho. State line, and in Big 
Horn County. Moderate infestations have developed in Chouteau and Yellowstone 
Counties., The' heavily infested area in Nevada has decreased by approximately 
500,000 acres and the moderately infested area in that State has decreased by 
nearly 400,000 acre's. ■ The most serious infestation in that State was the east- 
ern part of Humboldt County. 
Significant infestations of Mormon crickets in Oregon were found in the 
north-centfal counties of Jefferson, Wasco, Gilliam, and Sherman Counties. In 
South Dakota the moderate and heavy infestations are confined to Lyman County. 
During the 194l sea.son banding and migrating of the Mormon cricket was ' observed. 
The size of the infested -area in Utah is reduced over that of 1940. 
Heavily infested areas in Washington are located in Franklin County. In 
Wyoming a general increase of both heavily ? and moderately infested areas was 
■observed.' More than half of the infested area is in the mountainous and non- 
agricultural parts of Hot Springs County, Other heavy infestations were located 
in Sheridan County,' although it is not probable that the conditions in this 
c.ounty will be. as serious as in 1937, 193&i and 1939 • (C* Wakeland, Bureau of 
Entomology and Plant Quarantine, U. S. D. A.) 
EUROPEAN CORN BORER. — In 1941 considerable spread, of the European corn 
borer was recorded "west and southwest of the previously infested area in 
Wisconsin; Illinois, and Indiana, and toward the southeast in Pennsylvania, 
Maryland, Virginia.,, and-’ North Carolina, •• extending the known distribution by 77 
counties. In Wisconsin- the infestation covers practically half of the State. 
About the same proportion of Illinois is known to be infested. First records 
..were obtained, in 9 counties in eastern Virginia, the infestation appearing in 
all of, the counties along the Potomac River, and in several counties adjoining 
the older Infestation of the State near the coast;. European corn borer .was 
also first recorded in Washington, D. C,, in 194l f and in 1 county of North 
Carolina,., on the southern border of Albemarle Sound. A detailed report of this 
insect by A. M. Vance appears ; in Supplement to No. . 9 . .of Volume 21 of the Insect 
Pest Survey Bulletin, dated November 8 * I94l. 
CHINCH BUG.— The hibernation '.survey made .late in., the fall of 1940 showed 
rather heavy infestations of : bugs present frony northern Indiana to" southeastern 
South Dakota on the north, eastern Nebraska and. Kansas on. the west, and -Okla- 
homa on the south. Relatively light -.winter mortality was reported from most of 
the infested area; however, heavy spring rains in 1941 during the nynphal devok 
opment period of the first brood materially reduced the rather threatening gen- 
eral infestation to One of local moderate to rarely severe proportions over no si 
