ve 
If we combine the stages above given and eall the two the cocoon 
stage, we shall have a record as follows: One moth appeared in 12 
days; 3 in 14 days; 4 in 15 days; + in 16 days; 11 in 17 days; 13 in 18 
days; 18 in 19 days; 7 in 20 days; 10 in 21 days; 12 in 22 days; 7 in 
23 days; 8 in 24 days; 3in 25 days, and 3 in 29 days. This makes 
the shortest time in the cocoon stage 12 days and the longest time 29 
days, and the average 20 days. 
Hatching records kept for me by Mr. H. H. Griffin, at Rockyford, 
and at Grand Junction by Silmon Smith, indicate that the duration of 
the cocoon stage in those localities is practically the same as at Fort 
Collins. Riley' gives the entire cocoon stage as 15 to 21 days, Wash- 
burn? as three weeks, and Slingerland® as two or three weeks. 
Aldrich* gives the time as a week or more, but greatly dependent upon 
temperature. 
THE SECOND BROOD OF MOTHS. 
The time of appearance of the earliest of the second-brood moths is 
easily determined by hatching them from the earliest wormy apples 
of the summer. Riley gave this date for the latitude of St. Louis, 
Mo., as July 8; le Baron gave it for northern Illinois as July 15; 
Card, for Lincoln, Nebr., as July 2; Cockerell, for Mesilla Park, 
N. Mex., as June 26, and Professor Cordley has written me that for 
Corvallis, Oreg., he finds it to be about August-1. At Fort Collins 
the earliest bred moth of this brood appeared July 13; at Canyon 
City, Dr. Peare reports to me that he bred a moth July 15; at Rocky- 
ford, Celo., My. Griffin obtained the first moth July 5, and at Grand 
Junction, Mr. Smith obtained a moth on June 28. 
The following records for the very latest moths appearing of this 
brood (or some later brood, as the case may be) are of interest in this 
. connection. The latest moth to appear in breeding cages at Fort Col- 
lins came out September 16; the latest at Canyon City, September 10; 
at Rockytford, September 15, and at Grand Junction, September 12. 
These are all belated individuals, and all appeared after the general 
disappearance of the brood. (See Table IV, giving proportions of 
larvee that live over winter from different dates. ) 
THE SECOND BROOD OF EGGS. 
I know of no definite published records upon the second brood of 
eggs. At Fort Collins, this year, this brood seemed to begin its appear- 
ance about July 24, and they were most abundant about August 12. 
The two broods doubtless overlap, but at Fort Collins this year it was 
almost impossible to find eggs at all from the 20th to the 25d of July, 
‘Fourth Mo. Rep., p. 22. 
? Bul. 25, Or. Exp. Sta., p. 5. 
* Bul. 142, Cornell Exp. Sta., p. 27. 
4 Bul. 21, Id. Exp. Sta., p. 101. 
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