10 
BULLETIN 1051, U. S. DEPARTMENT OF AGRICULTURE. 
but may linger along for a considerable number of days. Two 
larvae, which were 2 days old when placed in a chest, were still 
alive (Table II) after 31 days in the chest, but were found dead 
when examined 6 days later. The majority of the very young 
larvae die by the end of the first or second week, without causing 
damage. The greater resistance of the older larvse is clearly demon- 
strated by the data. One 2J-month-old larva and one 2-month-old 
larva survived in the chest for over 2 months. Few people should 
have occasion to place in chests clothing containing larvae over 1 
month old. 
Table I. — Effect of four cedar chests upon 520 larvw ranging in age from 1 day 
to 3 months, placed in chests on May 14, 1921. 
Chest 
No. 
Date and result of examinations. 
Age on entering 
chest. 
May 21. 
May 31. 
June 6. 
July 7. 
July 23. 
July 27. 
Alive. 
Dead. 
Alive. 
Dead. 
Alive. 
Dead. 
Alive. 
Dead. 
Alive. 
Dead. 
Alive. 
Dead. 
1 
2 
3 
4 
1 
2 
3 
4 
1 
2 
3 
4 
1 
2 
3 
4 
1 
2 
3 
4 
1 
2 
3 
4 
1 
2 
3 
4 
1 
2 
3 
4 
1 
2 
3 
4 
1 
2 
3 
1 
2 
3 
4 
1 
2 
3 
4 
1 
2 
3 
4 
10 
no 
10 
10 
10 
10 
10 
10 
10 
10 
10 
10 
10 
10 
10 
10 
10 
10 


















6 
6 
6 
5 
9 
8 
8 
6 
9 
8 
9 
10 
9 
10 
10 
9 
10 
8 
4 
4 
4 
5 
1 
2 
2 
4 
1 
2 
1 

1 


1 

2 
4 
3 
6 
7 
2 



1 
1 



83 

1 

<2 
1 

1 
3 
8 
10 
10 
10 
9 
9 
10 
10 
10 
7 
10 
9 
10 
8 
9 
10 
9 
7 

10 
3 
8 
7 
7 
2 
3 
2 J months 
1 

9 
10 

10 
3 
7 
7 
8 
9 
7 
9 
8 
8 
10 
8 
7 
3 
3 
2 
1 
3 
1 
2 
2 

2 
1 
9 

10 

10 


10 
10 


10 
10 
10 
10 
10 
10 
8 
10 
9 
10 

10 
8 

2 
10 
3 
6 
1 




2 

11 

10 

2 
10 
8 

7 
4 
9 
3 
7 
6 
5 
3 
4 
3 
1 

2 
6 
6 
2 
4 
1 
3 

7 
3 
4 
5 
7 
6 
17 
9 
10 
8 
4 
4 
8 
6 
9 
7 
10 
2 
5 
2 
3 
2 

2 



2 





8 
5 
8 
7 
8 
2 10 
18 
10 
10 
10 
8 
10 
10 
10 
10 
10 







10 
10 
10 
10 
10 
10 
20 

10 
1 
8 
7 

20 
3 
4 

20 
5 
4 

10 
2 
3 
10 

7 
6 
10 

5 
6 
8 

2 
2 
8 
8 


10 
10 
2 


18 
10 
10 

20 
1 
1 
1 
1 
1 

1 



2 
19 
10 
9 
10 
10 
10 
8 

20 
1 

10 
1 

10 
Examination made May 7, 1921, showed no mortality among larvae placed in chests Apr. 30. 
Thoroughly active and normal. 
Alive but on point of death. 
Larvse doubtfully dead. 
