194o l)ut were scattered over a larger area, Danage to corn was noted 
in Phillips, Snith, Oshorno, Rooks, Ellis, and Hassell Coantics, This 
type of dai-iagc was cansed hy M, hivittatas and M, . differentialis . 
(August 3“9^* light hatching of second-genora.tion M, nexicanus was 
reported in the northwestern counties of Norton, Cheyenne, Decatur, 
and Rawlins; concentrations did not exceed 3 or 4 per squrno yard in- 
margins, and were less than 1 per square yard in stuhhle fields. In 
Shernan, Thomas, and Sheridan Coimtios, marginal counts ran as high as 
7 or g per square yard in isolated cases while field co\mts v;ere as 
high as 3 per square yard, Light®r popula-tions v/ero ohserved in Gove, 
Logan, Trego, and Wallace Counties, Second-generation M, mexicanus 
nymphs averaging less than 5 por square yard were reported in the south- 
wes'torn counties v/est of Seward Counts)^, Crop damage v/as confined mainly 
to corn and in irrigated valleys to alfalfa# 
Nohranko,,^ (August 3 “’ 9 ')» Marginal damage to com was hecoming incroa.singly 
apparent in the section of the State from Hall County eastvrard along the 
?la.ttc River, Severe daimge to alfalfa was reported in Harailton, Seward, 
and York Counties where 100-percent defoliation to entire fields v;as 
noted in several instances. Second-generation M, mexicanus were oh- 
served in southern Nehra-ska, from County westward to Cheyenne 
County, Eield populations ranged up to 20 per square yard and manginal 
populations up to 35 por square yard, 
Arkansas,^ (July 20-26); Infestation in northea.stern Arkansan v/as found 
to ho limited to the area between the Mississippi and Saint Erancis 
Rivers v;ith populations somewhat heavier in the immediate vicinity of 
the Mississippi River, Populations were widely scattered, from 90 to 
100 percent being M, differentialis , of x^rhich 90 percent were adults, 
Missouri,”^ (July 20-26): M, differentialis , the dominant species, com- 
prising 90 to 100 percent of the populations in southeastern Missouri, 
was 90 percent adult,. 
H, E, Brown (Aingast 29): A fev/ ovipositing females of M, bivittatus 
a,rc still present at Columbia, Practically all individuals of M, 
differentiadis are now adult, Populrdions over the State generally 
are too low for satisfactory collecting for adult survey, 
lowa,^ (Au/pist 3*"9)! Gra,sshopper infestations in the western half of 
lov/a v/ero revealed by the survey to be highly spotted v/ith M, mexi— 
canus distributed generallj/ over southwestern lov/a, M, femr-rubrum Deg#, 
the dominant species in northwestern lov/a, and light populations of 
M, differentialis , occurring occasionally along the Missouri River 
Valley, Second-generation M, mexicanus v/cre present over the south— 
\/estcrn portion of the State, 
Minnesota,”^ (July 20-26): Infestations in the east-central portion of tho 
Sta.te wore reported very spotted and of little economic importance; M, 
f emur-rub rum , the dominant species, was mainly in the third instar. 
In soutiwestern Minnesota, JO pjorcent of M, differentialis and 100 per- 
cent M, bivittatus wore adults, tho heaviest and most serious infesta- 
