76 



BULLETIN 932, U. S. DEPARTMENT OF AGRICULTURE. 



Table LIV. — Time of deposition, length of incubation, and time of hatching of 

 eggs of the third brood of the codling moth, Grand Junction, Colo., 1916. 



Obser- 

 vation 

 No. 



Num- 

 ber of 

 eggs. 



Date— 



Appearance 

 of— 



Incu- 

 bation 

 period. 



»%£ *edring. 



»£ j Hatched^ 



Red 

 ring. 



Black 

 spot. 



1 

 2 

 3 

 4 



5 

 6 



7 ! 

 8 

 9 



10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 

 29 

 30 

 31 

 32 

 33 

 34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 

 42 

 43 

 44 

 45 

 46 

 47 

 48 

 49 

 50 

 51 

 52 

 53 



Av.... 



49 



2 



3 



31 



15 



138 



26 



117 



21 



82 



3 



34 



6 



2 



89 



68 



79 



77 



98 



82 



80 



16 



63 



27 



84 



15 



68 



5 



129 



16 



107 



7 



150 



71 



31 



2 



2 



51 



20 



7 



7 



11 



3 



3 



5 



1 



1 



1 



*5 



*1 



1 



n 



Aug. 12 

 ...do 



Aug. 13 

 ...do 



Aug. 14 

 ...do 



Aug. 15 

 ...do 



Aug. 16 



...do 



...do.... 



Aug. 17 

 . . . do . . . . 



Aug. 17 

 *Aug."i5" 



"Aug!" 16" 



Aug. 17 

 "Aug!" 18" 



"Aug! "l9" 



Aug. 19 

 "Aug! "l9" 

 "Aug! "26" 

 "Aug! "2l" 

 * Aug! "22 



"Aug! "23* 



Aug. 20 

 Aug. 21 

 Aug. 20 

 Aug. 21 



...do 



Aug. 22 



...do 



Aug. 23 



...do 



Aug. 24 

 Aug. 25 

 Aug. 24 

 Aug. 25 

 Aug. 26 

 Aug. 25 

 Aug. 26 



...do.... 

 Aug. 27 



...do 



Aug. 28 



...do I 



Aug. 29 



...do i 



Aug. 30 

 Aug. 31 

 Sept. 1 



!!!do!!!! 



Sept. 2 

 Sept. 3 



" Sept! "V 



Sept. 5 

 Sept. 6 

 Sept. 4 

 Sept. 5 



...do 



Sept. 6 



...do 



. s t:. 7 . 



Sept. 8 

 Sept. 10 

 Sept. 8 

 Sept. 9 

 Sept. 11 

 Sept. 12 

 Sept. 14 



Days. 

 5 



Days. 

 7 



Days. 

 8 

 9 



8 

 7 

 8 

 7 

 8 

 7 

 8 

 9 



8 

 9 



8 

 7 

 8 



7 

 8 

 7 

 8 



8 

 8 

 9 



8 

 7 



I 



8 

 9 

 8 

 9 



10 

 7 

 8 

 7 

 8 

 7 

 8 



I 



10 

 7 



S 



s 



9 

 10 



I 



2 



6 



2 



6 



2 

 2 . 



2 



........ 



2 



!!!!!!?! 



2 

 2 



*" 



6 

 6" 



6* 



6* 



6' 



6" 



6" 



b" 



6" 



...do.... 



Aug. 18 

 . .do 



;;; 



Aug. 20 



'Aug! '24" 



Aug. 19 

 ...do 



Aug. 20 

 ...do 



Aug. 21 



..do 



Aug. 21 

 'Aug! '22* 

 "Aug! "23" 



Aug. 25 

 "Aug! "26" 

 "Aug! "27" 



Aug. 22 

 ...do 



Aug. 24 



Aug. 28 



Aug. 23 

 ...do 



Aug. 25 



Aug. 29 



Aug. 24 



Aug. 25 



...do 



...do.... 



Aug. 26 

 ...do.... 



Aug. 27 

 ...do.. . . 



Aug. 26 

 Aug. 27 



'Aug. 28 

 Aug. 31 



Aug. 31 

 ...do 



"Sept.* "2" 

 Sept. 3 



2 

 2 



... 



7 

 6 



2 



4 



7 



7 



...do 











Aug. 28 

 ...do. .. 



Aug. 31 



Sept. 3 



3 



6 



Aug. 29 

 ...do 



Aug. 30 

 ...do.... 



Aug. 31 



...do 



...do.... 



Sept. 1 

 ...do.... 



Sept. 3 

 ...do 



Sept. 1 

 Sept'. 2 

 * Sept." T 



Sept. 4 

 Sept. 5 

 "Sept. "6* 



3 

 3* 



6 



3 



6 





Sept. 4 | Sept. 7 



. 3 



6 





Sept. 10 





7 





Sept. 4 

 Sept. 5 

 Sept. 7 

 Sept. 10 

 Sept. 21 



Sept. 12 





8 











j Sept. 12 Sept. 19 



Sept. 21 



2 



9 



11 













2.49 

 5 

 2 



6.36 

 9 

 6 



7.77 

 11 

 7 



Max .. 

 Min... 





1 









1" 



* Eggs not included in averages, due to failure to develop fully. 



Length of incubation. — The tabulated data of the embryological 

 changes and length of the incubation of eggs of the third brood 

 are given in Table LIV. From these data it was found that the 

 average number of days from the date of deposition to the appear- 

 ance of the red ring was 2.49 days, maximum 5 days, and minimum 

 2 days; the average number of days from the time of deposition 



