THE CANKERWORMS 



23 



Table 9. — Emergence of moths of the spring canker worm, Wallingford, Conn., 

 1920 and 1921— Continued. 



IN 1920— Continued. 



Date. 



Emergency. 



Temperature. 



Remarks 



Male. 



Female. 



Maximum 



Minimum. 



Average. 



Apr. 3 



1 

 1 

 1 



1 



°F. 

 60 

 44 

 51 

 38 

 45 

 34 

 37 

 47 

 54 

 49 

 51 

 49 

 56 

 48 

 48 

 59 

 65 

 71 

 47 

 63 

 59 

 53 

 56 



°F. 

 31 

 34 

 35 

 30 

 30 

 26 

 23 

 24 

 28 

 30 

 35 

 33 

 30 

 38 

 39 

 33 

 34 

 41 

 43 

 44 

 43 

 37 

 35 



°F. 

 46.2 

 39.2 

 39.5 

 33.5 

 36.0 

 29.7 

 30.2 

 34.2 

 40.6 

 41.8 

 45.1 

 40.4 

 44.5 

 43.1 

 41.8 

 45.7 

 50.3 

 54.2 

 44.9 

 51.8 

 48.9 

 46.5 

 45.8 





Apr. 4 









Do. 



Apr. 6 





Clear. 



Apr.7 



2 







Apr. 8 







Apr. 9 







Cloudv. 



Apr. 10 



1 



1 

 2 

 2 

 1 



1 

 1 



Clear. 



Apr.ll 



Do. 



Apr.12 





Apr.13 



1 

 3 



5 



Do. 



Apr. 14 



Clear. 



Apr.15 



Do. 



Apr.16 







Apr.17 







Do. 



Apr.18 









Apr. 19 





2 



Do. 



Apr. 20 





Do. 



Apr.21 









Apr. 22 









Apr. 23 









Apr.24 







Clear. 



Apr. 25 





1 



Do. 









IN 1921. 



Mar. 17 



1 



2 



52 

 40 

 44 

 74 

 84 

 47 

 49 

 48 

 68 

 67 

 69 

 70 

 37 

 44 

 60 

 48 







Clear. 



Mar.18 



25 

 19 

 43 

 43 

 30 

 25 

 27 

 49 

 42 

 51 

 34 

 25 

 20 

 35 

 35 



35.6 

 33.4 

 56.4 

 59.0 

 39.5 

 35.4 

 39.0 

 57.2 

 51.8 

 56.2 

 51.4 

 30.7 

 32.9 

 48.2 

 40.5 



Do. 



Mar. 19 



1 

 1 





Do. 



Mar . 20 





Do. 



Mar.21 



1 





Mar.22 





Clear. 



Mar . 23 







Do. 



Mar.24 





2 





Mar.25 





Cloudy. 



Mar.26 









Mar.27 







Clear. 



Mar.28 







Do. 



Mar. 29 







Do. 



Mar. 30 







Do. 



Mar. 31 









Apr. 1 





1 



Do. 









ACTIVITY OF THE MOTHS. 



For the most part the habits of the moths are similar to those of 

 the fall species. On leaving the ground the wingless females proceed 

 to a near-by tree, slowly ascend the trunk, and make their way out 

 to the smaller branches. The period of greatest activity occurs at 

 dusk, and at this time mating usually occurs. During the day the 

 moths are for the most part sluggish and inactive, usually passing 

 the time under bark or concealed in other places, although the male 

 moths are sometimes seen on the wing on cloudy or foggy days. 



In from 2 to 6 days after emergence the female moths begin laying 

 eggs, and may continue oviposition for as long a period as 10 days, 

 although the greater part of the eggs are usually deposited during 

 the first few days of oviposition. The moth lays the eggs in con- 

 cealed places, to some extent on the main trunk, but for the most part 

 on the smaller branches, and sometimes deposits them well out to- 

 ward the tips of the twigs. In any event, they are hidden carefully 



