THE CAXKEKWOKMS 



17 



Table 7. — Emergence of moths of the fall cankerworm, Wallingford, Conn., 

 1919 and 1920— Continued. 



IN 1920. 



Date. 



Emergence. 



Temperature. 



Remarks. 



Male. 



Female. 



Minimum. 



Maximum. 



Average. 



Oct. 28 





1 





 

 2 

 

 

 

 1 

 1 

 1 

 5 

 

 1 

 2 

 

 

 

 

 4 

 

 1 

 43 

 18 

 15 

 

 5 

 14 

 1 

 

 1 



10 

 9 

 

 63 

 35 

 7 



13 

 115 

 15 

 1 

 

 

 

 1 



U- 



°F. 



52 

 39 

 36 

 39 

 43 

 40 

 43 

 35 

 42 

 40 

 38 

 37 

 35 

 33 

 29 

 25 

 19 

 22 

 27 

 34 

 36 

 35 

 32 

 37 

 29 

 32 

 37 

 33 

 31 

 28 

 30 

 31 

 24 

 25 

 33 

 33 

 26 

 38 

 41 

 34 

 29 

 24 

 25 

 32 



°F. 

 67 

 53 

 49 

 65 

 64 

 63 

 62 

 57 

 62 

 56 

 49 

 56 

 59 

 58 

 43 

 44 

 45 

 45 

 37 

 38 

 46 

 57 

 51 

 51 

 35 

 41 

 48 

 41 

 33 

 42 

 39 

 36 

 50 

 44 

 41 

 51 

 41 

 54 

 55 

 42 

 42 

 48 

 35 

 36 



"F. 

 60.2 

 46.5 

 42.0 

 52.3 

 52.8 

 52.0 

 51.1 

 46.7 

 49.9 

 46.0 

 43.5 

 44.0 

 50.3 

 47.2 

 34.8 

 33.1 

 30.1 

 32.1 

 32.5 

 35.8 

 39.5 

 42.3 

 41.3 

 42.8 

 30.8 

 36.0 

 41.8 

 36.8 

 32.7 

 32.2 

 34.9 

 34.9 

 30.6 

 36.9 

 35.7 

 40.0 

 34.8 

 43.8 

 46.2 

 39.3 

 34.6 

 29.4 

 30.5 

 34.0 





Oct. 29 





Cloudy. 

 Partly cloudy. 

 Clear. 



Oct. 30 





Oct. 31 





Nov. 1 





Partly cloudy. 



Nov.2 





Nov. 3 





Clear. 







Do. 



Nov.5 





Do. 



Nov. 6 





Do. 



Nov. 7 





Rain. 



Nov. 8 





Do. 



Nov. 9 





Cloudy. 

 Partly cloudy. 

 Clear. 



Nov. 10 





Nov. 11 





Nov. 12 





Do. 



Nov. 13 





Do. 



Nov. 14 





Do. 







Light snow. 

 Rain. 



Nov. 16 





Nov. 17 





Do. 



Nov. 18 





Clear. 



Nov. 19 





Do. 







Do. 



Nov.21 





Light rain. 



Nov.22 





Rain. 



Nov.23 





Do. 







Rain and snow. 



Nov.25 





Snow. 



Nov.26 





Clear. 



Nov.27 





Rain. 



Nov. 28 





Do. 



Nov. 29 





Clear. 



Nov.30 





Cloudy. 



Dec. 1 





Rain. 



Dec. 2 



1 



Partly cloudy. 

 Clear. 



Dec. 3 



Dec. 4 





Rain. 



Dec. 5 





Do. 



Dec. 6 





Light rain. 



Dec.7 





Partly cloudy. 

 Clear. 



Dec.8 





Dec. 9 





Partly cloudy. 



Dec. 10 





Do. 









Upon emerging, the females make their way to the base of a near- 

 by tree, and commence their ascent. If the weather is unfavorable — 

 cold or rainy — the ascent may occupy several days. During espe- 

 cially cold periods, moths have been observed motionless in one spot on 

 the trunk of a tree for 48 hours. Under ordinary conditions, how- 

 ever, their progress is much more rapid. The moths do not always 

 reach a tree in their efforts to find a suitable place for oviposition, 

 in such cases laying their eggs wherever they are able. 



PROPORTION OF THE SEXES. 



For some unexplained reason, all larvse which were carried 

 through in the insect ary from egg to adult developed into female 

 moths, and from field material, collected for the most part when the 

 larvae were in the last stage, only two males emerged in 1919 and 



75522°— 24 3 



