10 



BULLETIN 1051, TJ. 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 larvae is clearly demon- 

 strated by the data. One 2^-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 larvm 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 



110 



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 

 

 

 



33 

 

 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 













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 













































1 month 



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 



»10 



18 



10 



10 



10 



8 



10 



10 



10 



10 



10 





 

 

 

 

 

 



10 

 10 

 10 

 10 

 10 

 10 

 20 









































3 weeks 









































2 weeks 



































10 





















11 days 

























































8 days 































8 

 7 

 



20 

 3 

 4 

 



20 

 5 

 4 

 



10 



2 

 3 



10 

 

 7 

 6 



10 

 

 5 

 6 

 8 

 



2 

 2 



8 

 8 





 



10 



10 























1 



3 days 















2 





 



18 

 10 

 10 







20 























1 

















1 



2 days 















1 





1 

 



1 





 

 

 2 



19 

 10 



9 

 10 

 10 

 10 



8 







20 























| 









10 











i 



1 day 











1 

































i 













10 





























1 Examination made May 7, 1921, showed no mortality among larvae placed in chests Apr. 30. 



2 Thoroughly active and normal. 

 8 Alive but on point of death. 



4 Larvae doubtfully dead. 



