20 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
TaBLe V1I.—Life cycle of the first generation, Walnut Creek, Cal., 1909-—Continued. 
Date of— Days for— 
Individ- | | die Ts Vy ea a 
ual No. | Egg dep- ; » Larva > 7 Emer- Feed- | Making Total 
| osition ors leaving see gence of aes ing of | of co- et life 
(night). fruit. : moths. -| larva. | coon. | Pe =| eycle: 
BY eo ae May 9/| May 30] July 1) July 6) July 25 21 32 5 19 7 
OB ete 9 30 2 6 | 25 21 33 4 19 77 
OOk cece asee 9 30 29) Wee? oe eal ease cee 21 bd BES eeeee Seema ers 5 
Ase ate 9. Se ceased Meee! eee |e |e = Su cleta |S - mrokic o3| pecicc eee | meee ees ee | 
4s soe 9 SOW SS Ase s-c | Seasoect oe lc eee 7A ease ete lect arctic Sec oetsel es er = 
42 oe sca e at ) 30 2p Se fos ocee alisteseee ese 21 26) ||: a5 as |eeeiee o-|Peeseeee 
CS Sere 9 608 Ses cen ac Haaos aac rl peere sacs 21. S52 Aen Rees Pees Goes 
AAS Stacie 9 29 71 fl Eee ae 19 20 20M) occa toce |e oases | pe ae eee 
SOM ewes 9 29 BA: Wo, see eee roe aie 20 26) ||Sseeb coal ee eas Pee eee 
cee | 9 30 Zoe ee meer een A | 21 720) ee ete ese hth eal er 
Wie 9 ri Reaeeneene aden ae ees aeeates DI lk oes lies Sed eee teal eee ae 
AS ois ote 9 30 1 esses Joost 21 S2a ante ass S [eeee oe eee 
AO ee Free 9 B00 epee tetal he bis eet ees ete cee QNG\SAee eh = tee See ee | eee 
i) so aeeae 9 30 1 ee eee |e eeen ea 21 ZO) ie Sa eel ea i= ee 
Biro sas ee: 9 30) | Reel aes Vise ee th ecl ce DG |B dha ||-ee ngs eee ee ee 
GP] alte | 9 SONI Sea o a | Reet | eee Ofa|ecne fese |e ok aae | cee ee 
Joeeeeeee es 9 30 | June 28 6 22 21 29 8 16 74 
OF se eacscae 10 QO le acokreretoee alle ete erp eerie cea LOM a cea noel a S| ete Spee lee ees 
He ee 10 29 31 Beaeseeere es sssecor. 19 32) |. 2 on-set Sasktel eee 
DOs. <--beee| 10 27 30 6 20 17 34 6 | 14 71 
| 
SUMMARY. 
Days for— 
Ceres: Tncuba- F cegine Making Pupal | Total life 
tion. ea. Cocoon period. cycle. 
IAN ET APC bic are 5 Sarcitte oe ree hee ta ese eee == < SPREE SS 20. 05 29. 97 6. 85 17. 58 74. 25 
Maximumors. 523 ane. Se aoe stneese = oan cece een 22. 00 42. 00 11. 00 23. 00 78. 00 
Minima wns se = esis 21a (td asis Seis cee sis donee ee : 17. 00 24. 00 4. 00 14. 00 71. 00 
rIRST-BROOD LARVZ. 
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 larvee 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 .larvee were quite numerous by May 3. Very 
young larve were found continuously until the Ist 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 pupe and 20 full-grown 
iarvee were found under bands on 21 pear trees, and 4 pups and 28 
