92 . 
Fab., was by far the most numerous, but other insects assist somewhat 
in the injury, among them Atimia confusa Say. The first or second 
year after the borers have begun work the woodwork is greatly 
marred by the exit holes which are left in the bark. 
May 13,1901, we received information from Dr. R. H. Lawton, 
together sat accompanying specimens, that /7Zylotrupes ligneus was 
the cause of considerable tr eablea in the cedars in his vicinity. March 
30 the beetles made their appearance in an office in that town and 
were very plentiful until the middle of April, when they disappeared. 
Dr. Lawton found in a basement a pile of cedar sticks from which 
the insects had emerged. ‘The sticks were badly damaged and fully 
accounted for the number of the beetles. 
There seems to be no practical remedy when cedar wood is used for 
outdoor ornamental purposes. If it were kept indoors for a season or 
more and saturated in April and May with gasoline, or some similar 
preparation, it might be kept free from infestation and in time the 
wood would be so dry that the borers would not attack it.—F. H. C. 
INEFFECTIVENESS OF KEROSENE EMULSION AGAINST WHITE GRUBS. 
One of the remedies which has been frequently suggested as of 
value against white grubs is the kerosene emulsion. Its use has been 
advised in various publications and in the correspondence of this 
Division. 
Kerosene emulsion diluted with 15 parts of water, applied to celery 
by Mr. Lull, formerly of this Division, in 1893, did not injure the 
plants, but killed the larvee of Adlorhina nitida which were at or near 
the surface of the ground, but apparently failed entirely to reach such 
larvee as were at a ‘depth of two inches or more beneath the surface. 
This matter was brought to the attention of the public in Bulletin No. 
10, in an article by Dr. Howard (p. 25). 
Mr. W. K. Shaw, acting upon our suggestion, tried kerosene 
emulsion against larve of Lachnosterna, presumably Lachnosterna 
Jusca, the common white grub of Massachusetts, in the vicinity of » 
Boston. He was at first of the opinion that it killed the small grubs 
but did not affect the larger ones. Later he could not see that the 
most careful use of this emulsion was effective against these white 
grubs. 
There is no doubt about the strength of the emulsion, as Mr. Shaw 
is a graduate of the Massachusetts Institute of Technology, and direc- 
tions for the preparation and application of this insecticide were fol- 
lowed implicitly, the ground having been thoroughly soaked, and in 
each case followed by an effective rain to wash the kerosene more 
thoroughly into the ground. 
