16 
A summary of the more important records is here given: 
Records of capture of codling-moth larve under bands. 
Days -| m . 
| Observer or Num- First Second be- Total | Time be- | Aver- 
. ae an oe : ea 4 BART seF any ae num- | tween re- | age 
Year. Locality. | source of rec- | berof| maxi maxi tween | per of moval of | per 
| | ord, trees. | mum. mum. nae wioraiad a tees frda 
| i] 
1897 °| Boise )/<=-2--=-- | Mr. Ayers ..-.- 140 | July 17 | Sept. 1 46 | 12,247 | Weekly...| 87.48 
1898)... 2 WOR oe ose ele Seer (a | eter 140 | July 10 | Sept. 10 62 | 20,909 |..... do....| 149.35 
1899 | Juliaetta ..... eet Ald- 40 | July 20 | Sept. 24 66. | .°8;620 25228 do ....| 215.50 
| rich. 
1901 | Nampa ......- | H. G. Gibson -- 4] July 26 | Aug. 11 46 467 | Daily ..... 116.75 
1901 | Payette......- | J. Shearer ....- 3 | July 18 | Aug. 17 60 | 215 | Weekly...) 71.66 
TOOU hee Mo sr 24i se aces des 33 80 | July 1] Aug. 30 6) |\:3) bo4e)-- eee do....| 44.42 
POO oad Oe eae oat hose AO =Le ee 128 | July 5 |....do-...| 56.}) 1,690" )--2 5. dos: |S ise 
1901 Provo, Utah..; Utah Agricul- 23, |2:.-d0'=. Sept. =2 Oh 4A Tat eee do ....| 180 
tural College. 
AO018 || ose GOSts eee Tee DOs ese 26 | July 13 | Aug. 27 45 | °° 2,829 | oe do ....| 108.2 
1901 facet GO weansene aa (6 Coane 34 | July 5] Sept. 2 50 | 2,880 jo... do 84.7 
1901 | Hagerman ...| R. E. Conner .. 27 | July 12 | Sept. 4 54 19452 dos 8.2 
1901 | Lewiston ....- | S. G. Jasman .. 4 |...-do...| Sept. 10 60 666 | 6 permo..| 166.6 
1901 | Caldwell ..... | Wm. C. George. 10 | June 25 | Aug. 13 49 640 | 2-5 days...) 64 
Total and average........ G97 | cater Sapo | Oe en ere 56 [ool ek ES ee 
| 
All of the records here given show plainly that there are but two 
maxima of larve entering bands. There are many sources of error 
in obtaining the figures. A maximum lasts from six to eight days. 
Weekly records are much more liable to error on account of the length 
of the intervals. The average length of time between maxima, fifty- 
five days, is undoubtedly too high, as the records of Mr. Gibson 
and Mr. George show the time to be forty-six and forty-nine days, 
respectively. 
The writer has secured many other records, but they can not be 
relied upon for determining the number of generations, as some of 
them were taken on too few trees, and others commenced too late or 
stopped too early in the season. 
The intervals between the maxima may be approximated in another 
way. From one maximum of larve entering bands to another should 
be the length of the life cycle of the insect. The length of the stages 
in the life of this insect vary greatly, and averages can be accurately 
determined only by a great number of experiments. The observa- 
tions of the writer upon the length of the different stages are not 
so complete as could be wished, but will serve to show the averages 
approximately. The egg stage was found to vary from three to eight 
days, with an average of about five days. The life of the larva outside 
of the cocoon is from fourteen days to twenty-five days, averaging 
about twenty-one days. The time spent in the cocoon was found to be 
from twelve to twenty-eight days, averaging about twenty-two days. 
The egg-laying period was observed to begin the second day after the 
emergence of the moth and continue till the fourth day. Three days 
would probably be a good average. The total of these averages is 
fifty-one days, which time compares favorably with the interval 
between the maxima of larvee entering bands, 
ri 
