68 



BULLETIN 932, U. S. DEPARTMENT OF AGRICULTURE. 



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

 of eggs of the second brood of the codling moth, Grand Junction, Colo,, 1916 — 

 Continued. 



Obser- 

 vation 

 No. 



Num- 

 ber of 

 eggs 

 depos- 

 ited. 



Date — 



Number 



of eggs 



hatched. 



Appearance of— 



Incu- 



Depos- 

 ited. 



Red Black 

 ring. spot. 



Hatched. 



Red 

 ring. 



Black 

 spot. 



bation 

 period. 



77 



78 



79 



80 



81 



82 



83 



84 



85 



86 



87 



88 



89 



90 



91 



92 



93 



94 



95 



96 



97 



98 



99 



100 



101 



102 



103 



104 



105 



106 



107 



108 



109 



110 



111 



112 



Total. 



212 

 1,806 



Aug. 13 

 Aug. 14 



Aug. 16 

 ...do 



Aug. 19 

 Aug. 20 



Aug. 20 

 Aug. 21 

 Aug. 22 

 Aug. 23 



...do 



Aug. 24 

 Aug. 23 

 Aug. 24 

 Aug. 25 



...do 



Aug. 26 



...do 



Aug. 27 

 Aug. 28 

 Aug. 27 

 Aug. 28 



...do 



Aug. 29 

 Aug. 30 

 Aug. 31 



...do 



."ll: 1 .. 



Sept. 2 

 Sept. 3 

 Sept. 2 

 Sept. 3 



...do 



Sept. 4 



...do.... 

 Sept. 5 



"Sept." "6" 



...do 



...do 



Sept. 8 



155 



307 



1,300 



72 



1,411 



49 



147 



975 



40 



811 



578 



145 



455 



34 



80 



447 



8 



213 



205 



46 



111 



11 



42 



35 



3 



46 



21 



51 



10 



52 



9 



12 



2 



7 



1 



10 



Days. 

 3 

 2 



Days. 

 6 

 6 



Days. 



7 

 7 

 8 

 9 

 8 

 9 

 7 

 8 

 9 

 8 

 8 

 7 

 8 

 9 



8 



8 

 8 

 9 

 8 

 9 

 8 

 9 

 10 

 8 

 9 

 8 

 9 

 8 

 9 

 8 



8 



7 

 8 















1,641 



Aug. 15 



Aug. 17 



Aug. 22 



2 



7 



1,335 



Aug. 16 



Aug. 18 



Aug. 22 



2 



6 















943 



723 

 689 



Aug. 17 

 Aug. 18 

 Aug. 19 



Aug. 19 

 Aug. 20 

 Aug. 21 



Aug. 24 

 Aug. 25 

 ...do. . .. 



2 

 2 

 2 



7 

 7 

 6 















613 



Aug. 20 



Aug. 22 



Aug. 26 



2 



6 



263 



Aug. 21 



Aug. 23 



Aug. 27 



2 



6 



306 



Aug. 22 



Aug. 24 



Aug. 29 



2 



7 



132 



Aug. 23 



Aug. 25 



Aug. 29 



2 



6 



89 



Aug. 24 



Aug. 26 



Aug. 31 



2 



7 















74 



Aug. 25 



Aug. 27 



Sept. 1 



2 



7 



80 



Aug. 26 



Aug. 28 



Sept. 2 



2 



7 



65 



Aug. 27 



Aug. 29 



Sept. 3 



2 



7 



18 



Aug. 28 



Aug. 30 



Sept. 4 



2 



7 



9 



1 

 12 



Aug. 29 

 Aug. 30 

 Aug. 31 



Sept. 1 



...do 



Sept. 2 



Sept. 5 

 ...do 



Sept. 6 



3 

 2 

 2 



6 

 6 



46, 410 











43,624 



































2.06 

 3 

 1 



5.80 



7 

 5 



6.93 

 10 

 6 



Max.. .. 





























Length of incubation.— As previously noted, eggs of the second 

 brood were deposited from July 3 to August 31, inclusive, and dur- 

 ing this period observations of the length of incubation and em- 

 bryological changes of these eggs were taken. The results in detail 

 are shown in Table XLVI. From the data obtained it was found 

 that the appearance of the red ring averaged 2.06 days from the time 

 of deposition, maximum 3 days, minimum 1 day ; the black spot ap- 

 peared on an average of 5.80 days subsequent to the time of oviposi- 

 tion, maximum 7 days, minimum 5 days; the average total length 

 of the incubation period was 6.93 days, maximum 10 days, minimum 

 6 days. 



Laev^ of the Second Beood. 



Time of hatching. — The hatching period of larvae of the second 

 brood is given in Table XLVI and, as appears therein, the first of 

 these hatched July 9, while the last hatched September 8. In con- 



