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coagulated and eye-spot stage, mexicanus and M. bivittatus were 
hatching in both fields and marginal areas in the southeastern half 
of the State, while in the extreme southern counties, the ’hatch has 
been in progress for 2 weeks and the above-mentioned species are in 
the first and second instars, while M. confusus is in the second and 
third stage. The hatch in the southern counties is estimated. to be 
less than 25 percent complete. Populations range from 1 to 10 per square 
yard in the fields and 1 to 50 nymphs per square yard along the margins 
and roadsides. It is expected that the hatch in this area will be 
complete by June 10, In the northwestern portion of the State egg 
development up until May 22 was greatly retarded by cool, rainy 
weather; however, during the last few days temperatures have risen 
well into the eighties and eggs are beginning to hatch throughout 
the area. About a 6o percent hatch of M, bivittatus and 20 percent 
hatch of M, mexicanus has occurred. Predators, namely ground beetles, 
blister beetles, beeflies, and \d.reworms, have been quite active and 
have destroyed an estimated 25 percent of the eggs in some parts of 
this area. In the southwestern portion of the State, in Oliver, Mercer, 
Sioux, and Grant Counties, approximately 1 percent of the grasshoppers 
have hatched. Most of M, bivittatus and M. differential! s eggs are 
expected to hatch within a week, whereas M, mexicanus probably will 
require an additional week before hatching, Por the State as a whole 
it is estimated that the hatch is less than 10 percent complete. 
South Dakota, (May 12-*18); M. bivittatus was hatching generally on May l6 
in Beadle County and the areas southward. Northward the weather has 
been too cold to permit an extensive hatch, M, confucius is in the 
second and third instars and is now the dominant, nymphal species 
already hatched; however, M, differentialis forms about JO percent 
of the total infestation on all field margins, Differentialis is 
expected to begin hatching along thesoutheastern corner of the State 
between May 25 and June 1, In this area M. confucius is 100 percent 
hatched and M. bivittatus 25 percent hatched, M, mexicanus is not 
present in any numbers* The total hatch in southeastern South Dakota 
is not over 15 percent along roadsides and field margins, Nymphal 
populations in the heaviest marginal infestations average from 50 to 
100 per square yard. In the western portion of the State development, 
as well as hatch, has been held back by inclement weather, M, mexicanus 
and H. bivittatus are approximately 9^ percent in the first instar and 
2 percent in the second. Infestations are scattered and confined 
largely to hlfalfa fields and margins, with M, mexicanus making up about 
90 percent of the populations, (May 19-25 )s Cool and cloudy weather 
prevailed over the eastern part of the State throughout most of the 
past week and apparently retarded grasshopper development in this area. 
Very little damage to crops is noticeable. Most of M, mexicanus are in 
the first instar with jW, bivittatus developing rapidly, - . , 
Montana. (May 12-18); A light hatch of M. mexicanus was reported in Hill 
and Liberty Counties on May I5, Cool weather, however, has kept soil 
temperatures down and confined hatching for the most part to roadsides 
and field margins, A 30 percent hatch also was reported May I6 at Fort 
