-223- 
first and second instars, No movements of any significance are reported, 
and crop damage to date has been very light. (June 9-15) J In the 
counties south of Hui’on, namely, Sanborn, Aurora, Charles Mix, Gregory, 
and the Rosebud area, there are extremely heavy infestations along the 
margins and roadsides, Horth of Huron, populations range from 25 to 
several hundred per square yard on the margins and from 5 to 100 per 
square yard in the fields; however, the infestations are spotted in 
these northern areas. In most instances the infestations are composed 
largely of M, mexicanus and M. confusus. These species are in the second 
to fourth instars, and a few are adults. In Spink County from 22 to 6o 
percent of the total hoppers were adults. (June l6«-22): In the south 
central coiinties of the State, M. bivittatus is the dominant species 
followed by M, diff erentialis , M. mexicanus , and M, confusus , 
M» bivittatus , M. mexicanus , and M, confusus are in the fifth instar 
and adult stages, with all of the latter species being adult, Ho heavy 
infesta-tions are reported but many are threatening. M. mexicanus 
occurs in small, scattered, threatening infestations in the western part 
of the State, M. bivittatus is also the dominant species in the eastern 
part except that in Clay and Union Counties, M. differentialis is more 
numerous. M. mexicanus is third in niimbers in this area. Infestations 
are not severe, M. mexicanus and M, bivittatus ranging from the first 
instar to the adult stage are the important species in the northeastern 
part of the State, Hatching is nearly complete and infestations are 
not at present severe. The same species, M. bivittatus , ’ M. mexicanus , 
M, differentialis , -and M, confusus , v/i th the addition of M, packardii are 
the important species in the central part of the State, and in a few of 
the southern counties. Some M, mexicanus and M. bivittatus are now 
adult as are all of the M, confusus . It is reported that a severe 
infestation is located in Sully County. In the north, M. mexicanus are 
about 90 percent adult, M, differentialis 60 percent second instar, and 
M, bivittatus 50 percent fovirth instar and 2 percent adult, B, magna 
constitutes 10 percent of the infestation in Corson County. The infesta- 
tion is spotted, v;ith severe spots being found in several counties, Con«- 
siderable movement of the M, mexicanus has been noted on hot days, 
North Dakota, R, G. Butcher (June 25) J Beginning to cause marginal crop 
damage and much alarm throughout much of the northeastern quarter of 
the State, M. mexicanus is the predominant species, with M, bivittatus , 
M, packardii . M, differentialis , and _C. pellucida as other important 
species. Hatching not complete but ranges from 90 to 100 percent in 
the southern half of the State and from 60 to SO percent in the northern 
half. (June 16 to 22): Serious infestations have developed in Pembina, 
Walsh, Ramsay, and Nelson Counties, The hatching is about 90 percent 
complete in the southern portion of this area and about 75 percent com- 
plete in the central and northern parts. Eggs yet to hatch are those 
of M. differential! s , Melanoplus angustipannis Dodge, M. f emur-rubrum , 
and D, Carolina L, M, mexicanus and M. bivittatus are in the fourth 
instar. About 50 percent of the M, confusus are adult in the Sheldon' 
area. In the remainder of the State M, mexicanus , M. bivittatus , and 
M, packardii , ranging from the first to the fifth instars, are the 
important species. Infestations are somewhat spotted in most areas. 
