THE CODLING MOTH IN MICHIGAN. 



49 



ever, the pupation period was longer. From the records of emer- 

 gence of moths we find that the earliest pupae must have appeared 

 about June 30 and the last pupse about August 24. 



Length of pupal stage. — In the course of rearing work two separate 

 tests on the length of the pupal stage have been made. One of these 

 (Tables XLVIII and XLIX) includes primarily observations on 

 the pupal stage; the other (Table LV) contains observations on the 

 life cycle of the insect. The results of Table XLVIII, including 132 

 insects, show that the period varied from 6 to 21 days, with an aver- 

 age of 14 days. The results from the life cycle series (Tables LV 

 and LVI), covering 75 observations, showed a variation of 11 to 24 

 days, and an average of 15.18 days. 



Table XLIX. — Lmgth of pupal stage of the summer brood, Douglas, Mich., 1911; 

 summary of Table XL VIII. 



Number 



Days 



Number 



Days of 



Number 



Days 



Number 



Days of 



of obser- 



making 



of obser- 



pupal 



of obser- 



making 



of obser- 



pupal 



vations. 



cocoon. 



vations. 



period. 



vations. 



cocoon. 



vations. 



period. 



1 



3 



13 



9 



17 



14 



2 



16 



18 



4 



1 



6 



28 



15 



2 



18 



21 



5 



4 



10 



5 



10 



24 



16 



17 



6 



3 



11 



8 



11 



4 



17 



10 



7 



25 



12 



1 



12 



3 



18 



23 



8 



21 



13 



1 



13 



1 



21 



Table L. — Time of 



emergence c 



/ moths of the summer brood from 

 Mich., 1911. 



band 



records, Douglas, 





Band records. 



6 



EH 



Date of 

 emer- 

 gence. 



Band records. 





Date of 

 emer- 

 gence. 



e8 



"tjb 



3 



ft 



i 







,3 

 w 

 © 



i 



| 



1 



c 

 



§ 

 i 





 % 



m 



a 

 _o 



3 

 ffl 



ft 



03 



"So 

 3 

 

 ft 



© 





 ,3 



© 

 M 



ci 

 ft 



s4 



B 



03 



© 



a 

 



| 



PS 

 © 





 u 



03 



w 



3 

 



3 

 © 



"o3 

 O 



EH 



July 8 









2 



3 

 4 

 21 

 16 



5 

 4 

 33 

 32 

 7 

 38 

 30 

 15 

 13 

 15 

 18 

 18 

 12 

 13 

 15 

 18 

 13 

 16 

 21 

 15 

 14 

 19 

 20 

 35 

 39 

 16 

 35 

 29 

 52 

 40 

 90 

 60 

 60 

 67 

 39 

 30 



Aug. 13 

 Aug. 14 

 Aug. 15 

 Aug. 16 

 Aug. 17 

 Aug. 18 

 Aug. 19 

 Aug. 20 

 Aug. 21 

 Aug. 22 

 Aug. 23 

 Aug. 24 

 Aug. 25 

 Aug. 26 

 Aug. 27 

 Aug. 28 

 Aug. 29 

 Aug. 30 

 Aug. 31 

 Sept. 1 

 Sept. 2 

 Sept. 3 

 Sept, 4 

 Sept. 5 

 Sept. 6 

 Sept. 7 

 Sept. 8 

 Sept. 9 

 Sept. 10 

 Sept. 11 

 Sept. 16 

 Sept. 17 

 Sept. 18 



Total . 



3 



6 

 1 



...... 



10 

 13 

 5 

 6 

 8 

 12 

 5 



6 

 19 

 10 

 8 

 6 

 9 

 3 

 5 

 2 

 5 

 2 

 3 

 2 

 2 

 1 

 2 

 2 

 1 

 1 



...... 



...... 



1 



3 

 12 



1 

 1 

 3 



22 



July 9 

 July 10 

 July 11 

 July 12 

 July 13 

 July 14 









53 



1 

 1 



2 



"T 



...„. 



""2 

 4 

 1 



""'2* 

 """io" 



8 

 12 

 4 

 6 

 5 

 1 

 3 



2 

 2 

 3 

 2 

 2 

 2 

 1 

 1 

 4 

 2 

 2 

 1 

 1 

 6 

 2 

 2 

 9 

 6 

 4 

 4 

 5 

 4 

 2 

 5 

 4 

 4 

 10 

 4 



4 

 8 

 4 

 16 

 9 

 4 

 2 

 3 

 3 

 5 

 1 

 2 

 1 

 2 

 2 

 2 



2 



2 

 2 

 4 

 13 

 7 

 15 

 12 

 17 



19 



3 

 5 



17 

 10 

 18 



1 



"i 



...... 



...... 



2 



1 

 2 

 3 

 2 



"2 



1 



4 



4 



...... 



...... 



2 

 11 

 7 

 2 

 5 

 3 



17 

 19 

 9 

 10 

 11 

 10 

 11 

 8 

 10 

 11 

 8 

 8 

 10 

 9 

 7 

 7 

 11 

 10 

 19 

 19 

 4 

 12 

 13 

 13 

 14 

 17 

 19 

 13 

 12 

 6 

 7 



99 







8 



July 15 

 July 16 

 July 17 

 July 18 

 July 19 

 July 20 







5 



3 



2 



...... 



2 

 ...... 



..... 



2 

 1 

 2 



8 

 5 

 3 

 1 

 4 

 3 

 2 

 2 

 2 

 1 



i" 



1 

 1 

 2 



1 



4 

 1 



4 

 2 

 1 



1 



21 

 15 

 6 

 7 

 6 



July 21 

 July 22 

 July 23 

 July 24 

 July 25 

 July 26 

 July 27 

 July 28 

 July 29 

 July 30 

 July 31 

 Aug. 1 

 Aug. 2 

 Aug. 3 

 Aug. 4 

 Aug. 5 

 Aug. 6 

 Aug. 7 

 Aug. 8 

 Aug. 9 

 Aug. 10 

 Aug. 11 

 Aug. 12 



1 

 1 





8 

 4 

 5 







4 



...... 



1 



3 

 5 

 3 



2 



1 



4 

 3 

 1 



1 



9 

 6 







3 



2 

 1 

 1 

 1 



1 



5 

 1 





1 

 1 

 1 



1 



3 

 2 













1 









1 







15 35 

 14 16 

 19 on 









i 

 1 

 1 





















22 

 9 

 13 



23 

 20 



7 











91 



287 



372 



89 



440 , 1.279 



! 



