LIFE HISTORY OP CODLING MOTH IN PECOS VALLEY, N". MEX. 25 



THE THIRD GENERATION. 



THE THIRD BROOD OF EGGS. 



Length of incubation. — In Table XXIV will "be found the results 

 of 96 observations of eggs of the codling moth in an endeavor to 

 determine the length of the several stages from time of deposition 

 until hatching occurs. The average length of time from date of depo- 

 sition to the appearance of the red ring was 3.22 days; maximum, 5 

 days; minimum, 2 days. The average time until the appearance of 

 the black spot was 4.22 days; maximum, 6 days; minimum, 3 days. 

 From date of deposition until time of hatching the average period 

 was 5.75 days; maximum, 9 days; minimum, 4 days. 



Table XXIV. — Length of incubation of third brood of eggs of the codling moth at Roswell, 



N. Mez., 1912. 



Observation No. 



1 

 2. 



3 

 4 

 5 

 6 

 7. 

 8. 

 9 

 10 

 11 

 12 

 L3 

 11 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 21 

 25 

 26 

 27 

 28 

 29 

 30 

 •31 

 32 

 33 

 34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 

 42 

 43 

 44 

 45 

 40 

 47 

 48 

 40 

 50 

 51 

 52 

 53 

 54 



Number 

 of eggs. 



53 



46 

 112 



30 

 120 



26 

 506 



42 

 401 

 103 

 342 

 127 

 192 



46 

 203 

 151 

 341 



85 

 432 



70 

 l ) 

 l ) 

 195 



15 

 160 



15 



227 



5 



158 



12 

 100 

 8 

 100 

 2 

 307 

 102 

 195 



12 

 300 



16 



90 



110 



104 



6 



80 

 180 

 200 

 109 

 207 



77 



60 



80 

 116 



Date of- 



Ovipo- 

 sition. 



July 22 

 22 

 23 

 23 

 24 

 24 

 25 

 25 

 26 

 26 

 27 

 27 



29 



29 



30 



30 



31 



31 



Aug. 1 



1 



2 



2 



3 



Appear- 

 ance of 

 red ring. 



July 24 

 24 

 26 

 26 

 27 

 27 

 28 

 28 

 29 

 29 



Aug. 



Appear- 

 ance of 

 black 

 spot. 



Aul 



July 25 

 25 

 27 

 27 

 28 

 28 

 29 

 29 

 30 

 30 

 31 

 31 

 1 

 1 

 2 

 2 

 3 

 3 

 4 

 4 

 5 

 5 

 6 

 6 

 7 

 7 



Hatch- 

 ing. 



July 26 



27 



28 



29 



29 



30 



30 



31 



31 



Aug. 1 



1 



2 



2 



3 



3 



4 



4 



5 



5 



6 



6 



7 



7 



Days for— 



Red 

 ring. 



Black 

 spot. 



3 

 3 



4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 . 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 

 4 



Incu- 

 bation. 



