- 192 
ARKANSAS 
This is the second year in which collections were made in Arkansas 
during the adult survey. There were 651 specimens collected in 4 
environments in which 9 species were represented. The dominant species 
is I.Ielanoplus dif f erentiali s , with M. f emur- rub rum second in numbers. 
Fifty-one percent of the total specimens collected were nymphs, which 
probably were either first-generation M. fem ur -rubrum or second-generation 
M. meric anus . In the 1937 collections LI. mcxicanus was dominant, with II. 
diff erentiali s second in numbers and M, f emur-rubrun third. Hatching 
began in March and continued throughout May and June. The worst infesta- 
tions are in the counties along the Mississippi Pdvcr. 
