Dec. ii, 1916 
Syntomaspis druparum 
497 
Table I .—Development of Syntomapsis druparum at North East, Pa., in IQ14 —Contd. 
Date of 
Stages of insect found. 
Period from infestation to 
examination. 
Date of 
infestation. 
examina¬ 
tion. 
Eggs. 
First 
larval. 
Second 
larval. 
Third 
larval. 
Fourth 
larval. 
Fifth 
larval. 
Days. 
8-10. 
July 12-14.• 
July 6. 
June 18-19.. 
June 27-28.. 
July 5. 
July 22 
July 16 
June 29 
July 8 
July 16 
July 8 
July 16 
July 8 
July 22 
July 8 
July 16 
July 22 
July 8 
. .do. 
17 
8 
1 
11. 
June 26. 
8 
12-13.. 
July 3-4-... 
June 24. 
12 
julv p. 
June 24. 
July 2. 
July fi. 
June 23. 
16. 
June 22.. .. 
il 
17. 
July 5 .. 
July 22 
July 8 
July 11 
July 16 
July 22 
July 11 
July 16 
July 22 
July 16 
. .do. 
17-18. 
June 20-21.. 
June 23 .... 
1 
7 
is 
4 
18-19. 
June 27-28.. 
July 3-4.... 
June 22 . 
2 
3 
20... 
Tune 26. 
3 
July 2. 
7 
Tune 24. 
4 
1 
June 23 
6 
Time 22. 
...do. 
6 
24-25... 
June 27-28.. 
June 20-21.. 
June 26. 
July 22 
July 16 
July 22 
.. .do. 
2 
1 
25-26... 
7 
10 
4 
June 25. 
6 
June 23 
.. .do. 
• 
6 
31... 
June 22 . 
July 23 
.. .do. 
32-33... 
June 20-21.. 
.do. 
38-39. 
July 29 
_do. 
40-41. 
June 18-19.. 
1 
r 
In 1915 the earliest hatching took place on the seventh day after 
oviposition, the earliest first molt on the sixteenth day, the earliest sec¬ 
ond molt on the twenty-first day, the earliest third molt on the twenty- 
fifth day, and the earliest last molt on the twenty-ninth day, and the 
first larva to consume the entire seed contents had done so on the forty- 
ninth day. The last larva to finish feeding required 57 days. 
Table II shows all the life-history data obtained during 1915 from 
cage-infested apples. As will be noted, all apples used in this work 
were infested during a period of 5 days from June 28 to July 2. Thus 
all individuals were developing under practically identical conditions. 
It will also be noted that many of the belated first-instar larvae and eggs 
were found in the mucilaginous tissue surrounding the central gelati¬ 
nous body. 
