18 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
TaBLeE XIX.—Jncubation periods of third-brood eggs laid in Cage IV (recorded in 
Table XV). 
Number | Eggs laid (at|} Red ring Black spot Length of 
of eggs. night). appeared. appeared. When hatched. egg stage. 
Days. 
55 VANI ES Siropesiera ANTES Uieeel es ANIONS eo seeee the Aug. 14,a.m.... 5 
54 Avg. 92.22. .|tAug oes Aug. 14, a.m....}| Aug. 14, night. . ‘| 5 
Records of other eggs, mostly of the third brood, laid throughout 
the latter part of the season are given in Table XX. 
TaBLE XX.—Incubation periods of miscellaneous second-brood and third-brood egqs. 
Number | Eggs laid (at} Red ring Black spot Length of 
of eggs. night). appeared. appeared. When hatched. egg stage. 
Days. 
94 Julyp30 5.24 eao cen vasalsoceoaenecsbeceaie Aug. 4, evening 5 
and night. 
23 AUG UZ... -- Aug.14,p.m.| Aug. 17, a.m....| Aug. 17, night... 5 
18 PNG Fa 1G ae ee Pe a eA ae ta Aug. 18, p.m... 5 
96 Aug. 28..... Aug. 30... Heply2esceeence- Sept. 3, p.m....| 54-6 
50 ANE 29 eo clevcle INES BIS Septs accesso ee Sept. sseee see 6 
46 Septeti.c a0. Sept. 9...... Sept. 13, a. m Sept. 13, p. m 6 
and night 
37 Sept. 11s -- 2: Sept. 13..... HeptelGsonceee es Sept. 17, m.....- 54 
3 Sept lisse cose: dee cece Sept. 24, a.m-..-| Sept. 25, p. m. 8 
and night. 
34 HOPbaco cee alecaue caer Ochs e saree: Octih anmeases 11} 
16 BED tesa ore cleeee ce neers tee eee en eee Oct 9=lhee seen ae 14-18 
4 OGtsIGs2 sone Oct. 18-19...| Oct. 29.........- Dried up.......- 13+ 
THIRD-BROOD LARVE. 
In the cages the first hatching of third-brood larvee was on August 
14. Judging from the emergence of second-brood moths July 25, 
third-brood larve probably appeared in the field during the first week 
of August. Owing to the early dropping of the small crop of fruit in 
1908, field observations on larvee entering fruit could not be made 
during September. In the cages larve continued to hatch in numbers 
up to September 20, and the last on October 15. The last lot of eggs 
developed as far as the black-spot stage on October 29, but failed to 
hatch. 
As the harvesting of the apple crop in this region ordinarily begins 
early in September, considerable numbers of the third brood would 
fail to mature before fruit picking. Reared larve of this brood 
began to mature September 2, and the band record for 1907 (p. 23) 
also shows an increase about this time. The calculated time of 
maturing of the earliest third-brood larve in 1908 is August 20. 
Owing to the dropping of the fruit in 1908, the band record for this 
season (p. 24) does not include a normal number of the later larve. 
In 1907 larvee spun cocoons under the bands as long as any apples 
were on the trees, and at harvest time many small worms were still 
in the fruit. 
