CODLING MOTH IN NORTHWESTERN PENNSYLVANIA. 87 
FIRST-BROOD MOTHS. 
Time of emergence—On August 2 the earliest first-brood moths 
emerged from band material collected July 13. As shown in figure 
20 and Table X XI, the moths gradually increased in number, reach- 
20 
AUGHZ ES Se CTS) PA TOMS IS tS ey IST NG! GIGMIS yy Ne 2O2N) W2225)24 2526 27 28) 29/30) 3 SEPE 2 3 eS 
Fic. 20.—Emergence curve showing first-brood moths, in 1909, at North East, Pa. (Original.) 
ing a maximum on August 26, at which time moths suddenly de- 
creased, emergence ceasing altogether about September 3. 
TABLE XXI.—Emergence of moths of the first brood. Material from banded trees. 
| Date of | Number Date of | Number Date of | Number Date of | Number 
emergence. | of moths. || emergence. | of moths. || emergence. | of moths. || emergence. | of moths. 
Aug. 2 4 Aug. 11 7 Aug. 20 18 Aug. 28 14 
Aug. 3 8 Aug. 12 7 Aug. 21 9 Aug. 29 12 
Aug. 4 4 Aug. 13 10 Aug. 22 8 Aug. 30 10 
Aug. 5 8 Aug. 14 13 Aug. 23 15 Aug. 31 5 
Aug. 6 3 Aug. 15 14 Aug. 24 5 Sept. 2 1 
Aug. 7 a Aug. 16 a Aug. 25 13 Sept. 3 1 
Aug. 8 5 Aug. 17 5 Aug. 26 22 —— 
Aug. 9 7 Aug. 18 6 Aug. 27 15 27 
Aug. 10 3 Aug. 19 10 
It is of interest to note that the rate of emergence of the spring- 
brood moths is almost the reverse of the rate of emergence of the 
first-brood moths. In the spring, shortly after the appearance of the 
first moths, the maximum is attained within about a week, while the 
decrease in the number of moths is more gradual and extends over a 
longer period. 
Oviposition period.—For oviposition records moths of this brood 
were confined in rearing jars, as has already been described for the 
spring brood of moths (p. 77). As shown in Table XXIV, the observa- 
tions include twenty-six separate jars, in which the number of moths 
varied from 3 to 17 for each jar. In five of the jars no eggs were 
30490°—Bull. 80—12——7 ‘ 
