4 BULLETIN" 264, U. S. DEPARTMENT OF AGRICULTURE. ' 
It might be added that it is fortunate that we can control this in- 
sect by comparatively simple means, since it is not desirable to fumi- 
gate violets when they are in bloom. Nicotine extracts are practically 
impossible, because of the more or less permanent odor which would 
obliterate that of the violets, and it is equally obvious that the use of 
arsenical sprays would be inadvisable. 
WASHINGTON: GOVERNMENT FEINTING OFFICE l 1915 
