19 
these localities approximates the time required for the entire life cycle, 
according to our records, and as the number of larve not transforming 
until spring rapidly increased from the dates given for the first eap- 
tured, so that within 20 days thereafter all were of this winter brood, 
it seems certain that there could not be a third brood in any of the 
localities mentioned, as there is not room for them. A partial brood 
from the early maturing second brood could be granted if necessary. 
Now, if we could find the first brood of larvee extending late enough 
to account for the last larve that pupate, we should have no need 
whatever to suppose a partial third brood. This we can not quite 
accomplish from the data at hand, but we can so nearly cover the 
period that the few days remaining, in which only scattering speci- 
mens are taken that pupate, would, in my estimation, easily be covered 
by the few individuals that have taken a longer time for development 
than our breeding records will show, as it is practically impossible in 
a few breeding experiments to include the extremes of a brood. 
In our records larve taken from the orchard late in April and 
transferred to a moderately cool cellar continued to give moths to 
July 24. This would easily account for eggs to August 4. As the 
first eggs were found at Fort Collins the same year, June 9, we have 
the egg-laying period extended over 56 days. 
As the first larvee were taken under bands at Grand Junction in 
1900, on June 10, and the last larvee pupating were taken August 12, 
these two dates mark the extremes of the brood, provided there is no 
partial brood. It exceeds the time our records indicate for it by 7 
days. The time is so nearly provided for that it seems that a partial 
brood can only be allowed when proven to exist by actually carrying 
the insect through the three generations in breeding cages. So while 
we can not say positively that there is nota partial third brood at 
Grand Junction, or even Roekyford or Canon City, our records do not 
prove it, and the writer is strongly inclined to the opinion that it does 
not exist. A complete third brood can not be accounted for at all. 
When Mr. Brothers, near Denver, last year collected 2,225 larvee 
and only 2 pupz under bands that had been on the trees since August 
2413 days—he proved very conclusively that only stragglers of the 
first brood were remaining at that date. 
I have not yet received sufficient data to state what the conditions 
may be in other States. Professor Cordley has recently written me 
that at Corvallis, Oreg., he has. not been able in four years to rear 
a codling moth later than September 15, and he gives June 20 as the 
date of the first eggs upon apples that he has been able to find. This 
makes the period for the broods at Corvallis even shorter than at Fort 
Collins. Healso states that his records ‘‘indicate two broods, and two 
only,” at Corvallis. Prof. W. M. Munson, of Orono, Me., also writes 
under date of August 17, that ‘‘some wormy apples placed in boxes 
August 1 are now yielding pup.” So there is at least a partial second 
brood in Maine. 
