38 
hedge rows; not a single specimen was found in these situations, 
although every temptation was afforded to hibernating insects, and 
many other species occurred abundantly. To what resorts the swarms 
which had developed in these situations had betaken themselves to 
pass the winter, I am not able to say. 
From the foregoing data we may construct a fairly full summary 
of the history of the chinch-bug- for the year. 
Although the season opened early, a period of cool and extremely 
wnt weather set in about May 1, throughout Northern and Central 
Illinois, and lasted until July. During all this time, although the 
old bugs were present in numbers sufficient to threaten serious in- 
iurv to all field crops, the usual early brood was either suppressed 
here, or destroyed as fast as it appeared, except, possibly, in here 
and there a more favorable locality, especially to the southward. 
In Southern Illinois an early brood seems, however, to have ap¬ 
peared. From the middle to the last of June, swarms of flying 
adults were seen throughout Southern Iowa and Central Illinois,— 
whether of the hibernating brood of the preceding year, or adults 
of an early spring brood which had developed at a distance, where 
the weather was less destructive, it is impossible to say positively. 
Their general appearance at about the same time in places so far 
apart,and the fact that adults had been continuously present 
throughout the season, while no young had been seen, makes it 
seem very probable that these individuals on the wing were those 
which had survived the winter; that the unfavorable weather had 
prevented the deposition of the eggs, or had, perhaps even hindered 
their development in the ovaries of the females, and that the bugs 
were finally driven to migrate in swarms, in search of more suit¬ 
able breeding grounds. 
The weather changed about July 1, and from that time forward was 
unusually pleasant throughout the summer. The small grain was now 
so far advanced as to afford no suitable food for the bugs, and these 
flying swarms consequently settled and laid their eggs in maize, broom 
command sorghum—of course scattering everywhere throughout the 
field. For this reason, although the number occurring in several fields 
was sufficient to do great and conspicuous mischief if they had entered 
the corn in masses from without, as is their more ordinary practice, the 
same number uniformly scattered attracted little attention and did! 
relatively little harm. By the middle of July most of these eggs 
were hatched, and the adults of this brood were gone by about July 
20 Mature specimens of the following brood began to appear a few 
days later, the first noted being August 8. (It is very likely that, 
adults of one brood will be found to overlap those of the next, in 
small number, so that no distinct division into broods can be de¬ 
tected, if these only are attended to.) By the last of August more 
than half the brood had completed their development, and at this 
time a few young of a following brood were seen at Jerseyville. This 
seems to have been a local phenomenon, however, as nothing of the 
kind was noticed later, in a long trip through Southern Illinois. 
After the middle of September no immature individuals were seen, 
and from this time until the middle of October flights of adults 
