18 
BULLETIX 901, U. S. DEPAETMEXT OF AGE I CULTURE. 
TIME AXD DURATIOX OF PERIOD IX GROUXD. 
Tlie duration of the period in the ground of 115 individuals reared 
varied from 12 to 17 days with an average of 14.50 days. This 
period is covered by records extending from July 14 to August 11. 
The data on time and duration of this period are given in full in 
Table XXIII. 
Table XXI. — Second larval 
stage of A. ivoodd, North East, 
Pa., 1918. 
Table XXII. — Feeding period 
of third larval stage of A. 
vjoodsi, North East, Pa., 1918. 
Number 
Duration 
Number 
Duration 
of larvae. 
of stage. 
of larvK. 
of stage. 
Days. 
Days. 
6 
4 
4 
4 
41 
5 
72 
5 
113 
6 
69 
6 
■io 
7 
12 
7 
3 
8 
18 
8 
1 
9 
14 
9 
1209 
2 6.00 
1 1S9 
2 6. 62 
1 Total. 2 ^'eigbted average. 
Total. 
Weighted average. 
DURATIOX OF PREPLlPAL STAGE. 
The prepupal period of 57 larvte recorded varied from 4 to 7 days, 
with an average of 4.68 days, as sho^vn by Table XXIY. The total 
period covered by records on the prepupa extended from July 14 to 
August 1. 
Table XXIII. — Time and duration of period in ground of A. uoodsi, North East, Pa., 
1917. 
Date of 
entering 
ground. 
Date of 
emergence. 
Number 
of indi- 
viduals. 
Duration 
of period. 
Date of 
entering 
ground. 
Date of 
emergence. 
Number 
of indi- 
viduals. 
Duration 
of period. 
Dgvs. 
Days. 
Julv 14 
Julv 29 
1 
15 
Julv 22 
Aug. 6 
11 
15 
14 
30 
4 
16 : 
22 
3 
16 
15 
30 
4 
15 
22 
S 
9 
17 
15 
31 
2 
16 
23 
4 
i 
12 
16 
30 
1 
14 
23 
6 
6 
14 
17 
31 
2 
13 
23 
7 
10 
15 
17 
30 
14 
24 
3 
14 
17 
Aug. 1 
2 
15 
24 
8 
5 
15 
20 
2 
2 
13 
25 
6 
1 
12 
20 
3 
1 
14 
25 
8 
1 
14 
20 
4 
1 
15 
25 
9 
6 
15 
21 
2 
1 
12 
25 
10 
1 
16 
21 
3 
4 
13 
25 
11 
1 
17 
21 
4 
8 
14 
26 
9 
1 
14 
21 
5 
5 
15 
26 
11 
1 
16 
22 
4 
4 
13 
22 
5 
13 
14 
1 115 
2 14.50 
1 Total. - Weighted average. 
DURATION OF PLTAL STAGE. 
The pupal period of 45 individuals recorded varied from 6 to 9 days,, 
with an average of 7.24 days, as shown by Table XXV. The total 
period covered by records on the pupa extended from July 20 to 
August 7. 
