25 
Now let us see how nearly this agrees with the appearance and 
disappearance of the moths and worms. 
Taking the Carbondale list, where the April and .June captures, 
as I know from actual observation, represent the first appearance 
of the moths in each case, we find the length of time that elapsed 
between the first in April (the 2d) to the first in .June (20th) to be 
seventy-eight days. This supposes the first observed in April had 
just issued from the chrysalis, as those observed in June were ob¬ 
served the day they issued, and therefore represent the shortest 
possible time. 
Lintner commenced collecting July 7th, and continued until Octo¬ 
ber 25th, by sugaring for Noctuidae; his examinations were made 
three to four or more evenings each week, without intermission 
during this period. Up to August 7tli no Army-worm moths were 
seen except on the evenings of July 7th and 21st. From the time 
they began to reappear in August they were absent no evening 
until he had passed October 6th, after which no more were seen. 
During this latter period they were abundant, and almost always 
in good condition. 
Those seen in July were evidently the last of a brood that pre¬ 
ceded those seen in August, September and October, the latter all 
certainly belonging to the same brood. Counting from the last of 
the first brood—July 21st to the last of the second (October 6th) we 
have just seventy-seven days. We have no positive evidence as to 
the time the moth first appears in this section. Supposing the 
pupa found by Meske about the middle of May, became a moth 
May the 20th, (as this occurred a few days after it was found), 
there will be from this time to the date of Lintner’s first August 
capture, just seventy-eight days. 
Prof. Piiley does not give exact dates of captures of the earliest 
of the different broods; but he speaks of capturing “Early in April,'’ 
and the “Middle of April,” “Middle of June,” “Early in August,” 
also “October 9th.” Assuming “Early in April" to be the 5th or 
6th, and the middle of June the 15tli; this gives seventy or seventy- 
one days. The continuation of the moths from the middle of June 
till early in August also corresponds very well with Lintner’s list; 
except that it is earlier in the season, which corresponds with the 
difference in latitude. But the moths of the third brood, according 
to the slight data he has recorded, appears to have been consider¬ 
ably longer making their exit from the chrysalides. 
The life period, as calculated by the meager data we have in 
reference to the appearance of the second brood of worms, is con¬ 
siderably longer than the estimate given. 
The first brood in Jackson county, Illinois, disappeared about 
•June 10th, and those of the fall brood seen were full grown in Sep¬ 
tember between the 15th and 80th. This corresponds almost exactly 
with Prof. Piiley’s observations as heretofore quoted. From June 
10th to September 20th gives one hundred and two days. It is not 
possible that there could have been an intermediate brood in this 
period, as the time is too short, and moreover there is an entire 
lack of evidence to sustain such a view. 
