THE CODLING MOTH ON PEARS IN CALIFORNIA. iS 
larve, 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 I.—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— | Date of— 
Indi- | Indi- stat fy Indi- 4 Daas 
vidual Eupet vidual | Papal | vidual hess 
No. | Pupa- | Emer- |P°°¢-|/ No. | Pupa- | Emer- | Pe "| No. | Pupa- | Emer- pemoe. 
tion. gence. | tion. gence. || tion. gence. 
| | — =e = 
Days. Days. Days. 
1 ee Mar. 11 | Apr. 20 40) || 25: = ..- Mar. 27 | May 6 40)|| 49... Apr. 4 | May 17 43 
2 ae 16 20 SD) |) 262-52 27 6 40502 a2, 4 17 43 
Ceo 16 27 ADM eto =e 2 29 7 39a oles oe 5 17 42 
ee ke 16 24 B39) 28242 5- 29 6 38 DO eee 5 22 | 47 
ee 17 21 30° || 29... ..- 30 7 Bish leas eioooe 5 19 44 
G22 2272 17 22 36 || 30. .... 30 fi 38 | O42 <.<.5 7 24 AT 
Dessee 17 | May 1 ATW Oe = 2.2 30 7 Boul lodeeee. 20 26 36 
(eee 17 2 46 || 32..... Apr. 1 6 Bi | 0 eee 21 26 35 
hates 18 11 Hae Rosen 1 7 B15 eee 20 25 35 
1082. 18 2 45 || 34.._.- 1 8 SU OSaosce 20 27 37 
| ee 18 1 44a Sb: 2 1 9 38 |) 59... 22 29 37 
pie 18 3 46 || 36....- 2 9 37060222. 22 24 32 
inieeee 19 4 081 | eo eee 2 9 eV (ial at) lee ee 777) | I, a= of 
i 19 9 cay b || |S 2s eee 2 9 B62. 5. 26 29 | 33 
Ges 19 4 AGS 395. <= - 2 10 38) || 632--=2 27 30 | 33 
GRAN eS 21 4 44 || 40..... 2 10 38 || 64.. 25 28 33 
i as 21 2 77 | ee 2 11 Bou Opt ace 21 28 37 
Sta 2. - 22 5 44 || 42.__.. 2 20 ARe||\*GGnee. = 16 25 39 
190 Le. 22 5 44 || 43.._.. 4 10 36) (W672 55—~ 16 26 40 
2 eee 23 5 AS: ||) 445< 5-5 4 12 BON || OSs. 18 30 42 
75 iste 295 6 42 || 45....- 4 13 39 
De a 29 4 40 || 46....- 4 13 39 VA VeT AOR cS ee meee | 39.54 
73 See 27 5 OO Nae sae 4 14 40 Maximini sao: oes | 54.00 
77 ae 27 6 40 || 48....- 4 17 43 Minininime= sos. 8sc. 2 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 IJ. 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. 
