aT 
paradichlorobenzene dissolved in cottonseed oil and painted on the in- 
jured areas. Mineral oil was also tried as a solvent, and while the 
control of borers appeared even better than that obtained with cottonseed 
oil, the solution caused considerable injury to the bark and wood adja- 
cent to the infested areas. 
Mr. Snapp has also conducted numerous tests of naphthalene as a 
possible substitute for paradichlorobenzene in the control of the two 
peach borers, the tests being parallel to those outlined in the preced- 
ing paragraphs. The results have been clear cut and definite; naphtha- 
lene used as outlined was found ineffective in the control of the borers 
and quite injurious to trees. 
JAPANESE BEETLE AND ASIATIC BEETLE RESEARCH 
Henry Fox, Moorestown, N. J., reporting on life history and hab-— 
its of the Japanese beetle (Popillia japonica Newm.), states that the 
downward movement of larvae in the soil was completed in November and 
winter dormancy began. He says: "Despite the remarkably high temper— 
atures prevailing during much of the second half of November, no indi- 
cations of an upward movement of the larvae, which under the circum- 
stances might have been expected, were observed. At present they are 
concentrated at a depth of from 2 to 6 inches below the surface." 
On the life history and habits of the Asiatic beetle (Anomala ori- 
entalis Waterh.) and the Asiatic garden beetle (Autoserica castanea Arrow), 
H. C. Hallock, of the Westbury, N. Y., sublaboratory, says that "after 
the middle of November most of the larvae of Autoserica castanea and 
Anomala orientalis were 8 to 12 inches beneath the surface, although some 
larvae could still be found within 4 to 6 inches of the surface during 
the last week of November. The very mild weather during this month 
is doubtless responsible for some of the larvae remaining nearer the 
surface than usual at this season of the year." 
F. E. Baker, Moorestown, reports that "nine more organic chemi- 
cals were tested against third-instar larvae of the Japanese beetle, 
using 25 per cent saponified castor oil soap as the emulsifier. "It was 
found at this time that the soap was not emulsifying properly, which 
waS apparently due to a deficiency of alkali. Consequently a com— 
pletely saponified castor oil .soap was made, * * * a test was run tO 
determine the toxicity of the soap alone. It was found that 25 cc., 
55 cc., 50 cc., and 75 cc. gave practically the same kill, which av— 
eraged 15.4 per cent. An increase in the amount of soap to this point 
seemed to have no effect on the larvae, although the completely sapon— 
ified soap seemed to be slightly more toxic than the 25 per cent sa— 
ponified soap previously used. The above tests involved the use of 
7,400 third-instar larvae." 
