THE CODLING MOTH ON PEARS IN CALIFORNIA. UNS) 
larvee, in early June, gives some three months for the transformation 
period of all the overwintering larve to adults. 
Length of pupal period.—The time spent in the pupal stage varies 
considerably for different individuals, but all of this brood in 1909 
required a month or more, the average time being 39.54 days. (The 
period of emergence of moths lasts some two months, from the first 
to the last appearing individuals.) Individual records were started in 
the spring of 1909 for 128 larve, but moths emerged from only 68. 
These records are given in Table I. 
TaBLe |.—Dates of pupation, duration of pupal period, and dates of emergence of moths 
of the spring brood from overwintering larve, Walnut Creek, Cal., 1909. 
| 
Date of— | Date of— i| Date of— 
Indi- 5 Indi- | ed |e | ld - Y 
vidual E uel vidual | | : ape I vidual Eupal 
No. Pupa- | Emer- Pee. No. Pupa- | Emer- DEO Oe aNios Pupa- | Emer- Ee: 
tion. gence. tion. gence. | tion. gence. | 
| 
| 
Days. Days. | Days. 
bac Mar. 11 | Apr. 20 AND lp2oneeee Mar. 27 | May 6 40 || 49..... Apr. 4 | May 17 43 
Deri 16 20 Si) IW) Abe es 27 6 40 || 50... .- 4 lyf) 43 
ems 16 27 cad EP eee 29 7 39) Sle. oe 5 17 | 42 
eee 16 24 39) || 28.25. 29 6 BR hoeie eee 5 22 | 47 
eae V7 21 S33) | I) Pega 30 7 380i Odseca.s 5 19 44 
6535.5 17 22 30)|;c0keae- 30 7 38 || 54..... 7 24 47 
eos 17 | May 1 AOMIK obs ose 30 rl Biot (Ra eee 20 26 | 36 
Sees. 17 2 46 |I''32..-. = Apr. 1 6 DO oO sereee 21 26 35 
CO eae 18 11 54 |} 338i. . -- 1 i DOn|| Obs se oe 20 25 35 
hOS 52. 18 2 45 || 34..... 1 8 Sialkassena- 20 27 BY 
Tile eee 18 1) 44 }| 35. 1 9 SS lpagese ae 22 29 37 
ik ae 18 3 | 46 || 36. 2 9 37 || 60 22 24 32 
Uses 252 19 4 46) ||8f-< 22 2 9 | SiO lesees DPN Neg ets a ae Se 
i ee 19 9 DWP SSeeesls 2 9 | Sie |NOze ser = 26 29 33 
igjaeeS> 19 4 46 || 39..... 2 10 SS Weoeeree 27 30 33 
Green 21 4 44 || 40....- 2 10 | ied WHEL eee 25 28 | 33 
I ee 21 2 42) || Als... 2 11 4) I) Ga Peee 21 28 37 
Lt eS 22 5 44 || 42._... 2 20 48) )11) O65. 5 16 25 39 
LORS eS 22 5 44 || 43..... 4 10 ory || Mey@aeoe 16 26 40 
iE 2 23 5 43 || 44..... 4 12 35) iRG8see20 18 30 42 
rR ae 25 6 AD!) 45.25. 4 13 39 || 
Daeeee 25 4 40 |} 46..... 4 13 39 Aer apens ae sesere aoe 39. 54 
ps ae 27 5 Se eee bee 4 14 40 |) Maxammam a. ses oe | 54.00 
bee 27 6 AQ) |48o ae 4 7 43 || libatboeqliednaes soe eee | 32.00 
From some 300 larve put in vials for individual records in Febru- 
_ary, 1910, 118 completed pupation and produced adults. Records of 
these are given in Table II. As will be seen, the pupal period was 
shorter for the spring brood in 1910 than was the case in 1909. In 
1910 the minimum was 21 days, with a maximum of 46, averaging 
30.86 days for all individuals under observation, as against an average 
of 39.54 days in 1909. 
