'- '263 
WI SC Oils IK 
This is the fourth year in which collections have been made in 
Wisconsin during the adult survey. Collections were made in 1935, 1936, 
1937, and 1938. In 1937 the number of specimens collected was only 242, 
and this was a meager representation. This past season 13,894 spccincns 
were taker. in 7 major environments in which 26 species were represented. 
Mel ano plus f cm.ur - rub rum was by far the dominant species in all environments, 
and formed 60 percent of the total number of specimens collected. M. mexicanus 
was second in relative numbers, at 11 percent. M. f emur- rub rum has held this 
position for the last 4 years. In 1933 and 1934 Camnula pellucida was most 
important, especially in the northern part of the State. Ho real comparisons 
can be made between 1937 and 1938 because of the vast difference in the 
numbers of specimens collected. 
The hatching of M. moxi canus began during the third week of May in 
the light- sandy- soil area. Continued rains delayed and prolonged hatching 
all through June and redueed nymphal populations considerably. M. f emur - 
rubrum was hatching in great numbers the first week of July and at the same 
time there were also adults in the same field. A great deal of bait was 
wasted in June because of rains, and most of the heavy baiting was done in 
July. The grasshopper potential in the 1938 survey is approximately one- 
half of what it was in the 1937 survey. 
