8 DECIDUOUS FRUIT INSECTS AND INSECTICIDES 
TasLe VII.—First-brood eggs—incubation records of eggs laid in Cages I and IT (recorded 
in Tables V and VI). 
A. 21 EGGS LAID IN CAGE I. 
Number _ nee Red ring Bie. When | Length of 
of eggs. (night). appeared. Sarena hatched. | egg stage. 
Days 
2 Apr. 19} Apr. 27| May 4] May 6 17 
5 Pe -d0ses24 EPdOnsnee May 5] May 8 19 
11 PO aece = EadOuenee Hoos May 9 20 
3 ~dOSs2.2 a Ose sete PUNdOE. cee May 10 21 
B. 46 EGGS LAID IN CAGE I. 
1 Apr. 24 | May 2 | May 10} May 11 16 
2 ee LOSsase Ee edOseee May 9| May 12 17 
6 oe COLaees SAO (eeeee MayalOueee doses 17 
30 Smedossens pa COneeee Mayimlily Bad oseene 17 
4 ad Oran oe Mayo esy|teeGdOuenee ese GOuuaee 17 
1 eed. 54 Mays 29|-ecdoss--- | May 13 18 
1 SeGOueess May .3)|He-scceeen May 14 19 
C. 16 EGGS LAID IN CAGE Il. 
= {May 17 | & 
16 | Maye eirere te | sogarao uss eee \ 9855 
D. 45 EGGS LAID IN CAGE II. 
= 
i 
.3 
| \(May 17 1 
abreast May 10; lke seat Notte bees | 
a.m. J 
| 
FIRST-BROOD LARV®. 
Period of hatching—The date of the earliest hatching of larve 
can be put fairly accurately at about April 27 (3 weeks after petals 
had fallen), as on that day out of 67 eggs collected in the orchard 
only 6 were empty shells and 2 in the black-spot stage, hatching 
the same day. No wormy apples were found until May 4, the calyx 
lobes probably concealing their work for several days. Larvee con- 
tinued to enter the fruit in numbers during nearly the whole of May. 
The last of the brood probably entered during the first week of June, 
which is allowing 10 days from the time of the last observed unhatched 
ego in the orchard. The great majority of the first brood of larve 
entered the fruit during May. 
Thus it will be seen that up to this time the different stages of 
the insect, instead of showing an increasing tendency to occupy a 
longer time, have actually become more compact. While it required 
about 24} months for the wintering larve to pupate, the sprmg moths 
issued within a space of 2 months and the first brood of larve hatched 
in scarcely more than 45 days. This is readily explainable from the 
influence of temperature on the different stages. The earliest spring 
