-In- 
festation. In northwestern Kansas A. turnbullii is 20 percent hatched 
and M, nexi conu s 10 percent hatched. Nymphs are 95 percent in the 
first ins tar. (May 11-17 ) : Throughout we stern Kansas, warn and dry- 
weather during the week has been highly favorable to development of 
eggs and nymphs. In the southwestern corner of the State, in the area 
immediately south of -the Arkansas River and extending from the western 
border of the State to Dodge City, approximately 400,000 acres have 
spotted infestations comprised of M, nexicanus and A. turnbullii . 
This sand-hill area has little vegetation except for sagebrush and 
Russian-thistlo. The grasshopper hatch in the area is complete with 
the nymphs predominately in the second and third instars. Popula- 
tions range as high as 75 per square yard; the area may become a 
reservoir from which light flights will develop. The hatch in the 
northwestern quarter of the State was about 30 percent complete, with 
A. turnbulli i comprising 60 percent and M. mexicanus 30 percent of 
the grasshopper population, Nymphs are Fo percent first instar, 30 
percent second instar, and 5 percent third instar. The heaviest in- 
festations occur in small-grain stubble and in crop margins, the 
marginal populations ranging as high as 500 per square yard 'and aver- 
aging about 100 per quare yard. Infestations in stubble average about 
30 per square yard. Winter wheat which suffered heavy marginal des- 
truction by second-generation M. nexicanus last fall was found occas- 
ionally infested along margins, with populations ranging as high as 
300 per square yard. Populations of A. turnbullii , ranging as high 
as 500 per square yard along wheat margins, are denuding thistle and 
pigweed plants but to date have caused no damage to wheat, 
ebraska. (April 27-May 3)* First-instar M. nexicanus nymphs were ob- 
served on April 30 Tn Keith, Chase, and Dundy Counties and on May 2 
in Webster County, in southwestern Nebraska. (May 4-10): The hatch 
was less than 5 percent for western and central Nebraska, with M. 
mexicanus and A. turnbullii being the species involved. Populations 
ranged up to 10 per square yard. (May 11-17') 1 ^arm, dry weather 
during the week favored grasshopper development throughout all sec- 
tions of the State. In western Nebraska the hatch by May 17 was 
estimated to be 75 percent complete, with A, turnbullii comprising 
65 percent and M. nexicanus 25 percent of the species present. Approx- 
imately 65 percent of the above species were first instar, 25 percent 
were second instar, and 5 percent third instar. Populations along 
field margins ranged from 10 to 225 in counties just north of the 
Kansas line end from less than 1 to 12 in the northwestern counties, 
Grasshopper hatching in central and eastern Nebraska was well under 
way ; the hatch of M. bivittatus was estimated about 50 percent com- 
plete, that of M. difforentialis 15 percent, and that of M. packardii 
5 percent. M, bivittatus were 50 percent first instar, 40 percent 
second, and 10 percent third. In the south-central portion of the 
State, hatching of all species is approximately 50' percent complete, 
with third-instar M. bivittatus and M. nexicanus and second-instar 
A, turnbull i i present. Populations in central Nebraska rouge as high 
as 500 per square yard along fiold margins and from 1 to 30 per square 
yard in fields. In the Nebraska Panhandle, populations range from 5 
to 135 per square yard in margins and as high as 10 per square yard in 
