20) DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
Taste VI.—Life cycle of the first generation, Walnut Creek, Cal., 1909—Continued. 
| Date of— Days for— 
| 
Individ- enh 
ual No. | TEfon | Hateh- | raving | Pups | gence of [Me™ | ing of | of eo | PAL | “ine 
(night). ing: fruit. Gon moths bation. larva. | coon, | Period. cycle. 
Dibessecee May 9] May 30] July 1] July 6) July 25 21 32 5 | 77 
Saar ies? | 9 30 2 6 25 21 33 + 7 
SOR et 9 30 QO fase Wee etek os 21 30) leo 224 =e 3 | See 
AQ ener te Ch See (SESE eee |e eee MRE Rees CRM eel pert alles Aarne oocac cu lec occu 
1 eee 9 OU Ele trsr= ee a ers oe va | mete attra 3 PA le Ren Saeraeel ee reacties ==. 
AD ane Se | 9 30 2b) eei:tsinie sea| nieeepee cles 21 2G eo orm < Sel| sore oe | roe 
BS i AR A ee | 9 OE eek SR ei cl es eee eek Ahn eae sal hes canes || ete ee oeeee 
AA 8 9 29 7H fl Seon eS 19 20 VALS |e eA ee eI Ds 88 fc 
Cie eee 9 29 DAS 2S se eeele se ceteen 20 268 Rae cme ae eeeesdlibosonkese 
AG eee | 9 30 71 3ke Bee Lee Rae 21 20) |e ees oeedtee aloes 
Ae PS | 9 BOW o.ceecedl Sanneeeace| eee sees cee Pa eel | wee |cceee cae | Seeeee 
AS finn aah | 9 30 Ve Eeecieeserel leer mrs 21 SOM ese eo eie 3.3 2 seca | Peace 
ci ae ere | 9 BO ee ere as wee eS MERE le eekoreicieass D1! | ie [ere ete 2 [eed ee See 
SO eae | 9 30 TID (ekeaee ts tae eaecs eee 21 ADEE 9.2 |. Pic st ea eee 
File Seer | 9 BO! | Serres eee yes [oes 22-202: ple Dee 2 1 ee ae eee ets Sos 
pean dr 9 50 sso ceroee | peeen oes es aneeeicse 2s DA ess 3 2|| ee ee SRE oe aoe ecss 
Oder maeictel 9 30 | June 28 6 22 21 29 8 | 16 74 
Ey enone 10 29) Weis oes eee os Se cle tee isacoee UY Spee Oe oc Cene Reeesse-s nce sae- 
iy ee Se tah } 10 29 3O)s| zee Cee oe hee 19 6771 CG ORE So Sete SS aoboc 
DOS tenes | 10 27 30 6 | 20 17 34 6 | 14 71 
SUMMARY. 
Days for— 
Observations : ; 
: ,. | Feeding | Making « 
Tae: | oft cot | noe 
: larva. | cocoon. | P : Sia 
INST OTA Clas he ptr Seatac eR Oey oe name 20. 05 29. 97 6. 85 17. 58 74. 25 
IN Ep Gb Wad Set ce mrenelan ih eon tea Ret Se ASS Sat Seis 22. 00 42. 00 11. 00 23. 00 78. 00 
NTiMUMTMS sce is Sao nee ee eases ee eee 17. 00 24. 00 4. 00 14. 00 71. 00 
TFIRST-BROOD LARVA. 
Time of hatching.—The first larvee under observation in 1909 
hatched May 7 from eggs brought in from the field. On May 11, 8 
recently hatched larves were found in the orchard. On this same 
date, May 11, 1910, young larve were quite numerous in the field. 
At Suisun, Cal., in 1910, the first larva was found April 29, and 
recently hatched larve were quite numerous by May 38. Very 
young larve were found continuously until the 1st of June. Larve 
at laboratory hatched May 26 to 30, and it is very likely that all 
first-brood eggs in the field had hatched and all larvee were in fruit 
by this time. 
Development of larve in fruit—Of the larve hatching under 
observation in 1909, only 29 reached full development in the fruit, 
requiring from 25 to 42 days. The individual records are given in 
Table VI. The first larva to leave the fruit in the field was not 
observed, but on June 5 three newly formed pupx and 20 full-grown 
larvee were found under bands on 21 pear trees, and 4 pupe and 28 
