18 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
TaBLE XIX.—JIncubation 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 SANT Ss secre ANI SS TS eee MUS Shee see cee Aug. 14) a. 1me- =. 5 
54 Ag) 955522. Aug. 12-5 2.2 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 X X.—Incubation periods of miscellaneous second-brood and third-brood eggs. 
Number | Eggs laid (at} Red ring Black spot : , |\Length of 
’ of eggs. night). appeared. appeared. When hatched. egg stage. 
e ies | 
Days. 
94 Tualys SOLE SR ee eee eS See Eee Keene meee Aug. 4, evening d 
and night. ‘ 
23 Ang eTae ae4 Aug.14,p.m-.} Aug. 17, a.m-.-...| Aug. 17, night... 5 
18 IL Bs 2 ral ope sot se REE EE CREE EEE Aug. 18, p.m... 5 
96 ANE. 282). 2-2 Ane 330 Fee e Septs22 s-5- 2256 Sept. 3, p.m....| 54-6 
50 Auge 292 5... Nb Mee Septs4ee-c--- es Sept. /O2sceeessse 6 
46 Sept. 7. ...- -- Sept: 9--22-. Sept. 13, a. m..-.| Sept. 13, p. m. 6 
and night. 
37 Sept. 11... . Peptslseesee septs l6s2-c2ec25 Sept. L7jMe=- 254 54 
3 Neptwlijaccte| seas ose eee Sept. 24, a.m-...| Sept. 25, p. m. 8 
and night. 
34 Septesaast halter ee ese OURS 3abencaned Oct. 5;a:mi> =. 114 
16 De te 2427 ea [Pee shee eee Raa cece ee serene Oct.9-15! ae s2 Ee 14-18 
1 Oct AGE tc. Oct-89 NsOcty20e-ea se Dried.up.s:2-22¢ 13+ 
THIRD-BROOD LARV, 
In the cages the first hatching of third-brood larve 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 larve entering fruit could not be made 
during September. In the cages larve continued to hatch intnumbers 
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 larvee. 
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. 
