hes 
the normal depth of hibernation of lurvae of P. japonica with that 
of native scarabaeid larvae, Wir. Fox conducted surveys in January at 
two localities characterized by racically different types «f soil. 
It is of interest. to note the variation in the hibernation depth of 
different native scarabacid larvae found in more or less close asso-— 
_Ciation with P. jayonica. The first locality selected was the golf 
- 
derivative of the underlyins gneissic rocks, was a very heavy clay 
loam of a deep red color and containing numerous angular stony frag- 
ments. At this place, four trenches were dug, each 5 feet long and 
2 feet wide. Two of these were dug to a depth of 40 inches, the 
other two to 30 inches. No larvae of any kind were encountered in 
‘these below 20 inches. Larvae of the Japanese beetle were not found 
below 6 inches, but thuse of Phyllcphaga, of which from 4 to 5: dif- 
ferent forms were represented, were traced to 20 inches, though only 
a Single individual was encountered below 15 inches. Of a total of 
124 Phyllophaga larvae obtained, 17 percent occurred above 5 inches, 
72.6 percent between 5 and 10 inches, 9.6 percent betweeen 10 and 15 
inches, and 0.8 percent between 15 and 20 inches. Two’ adults were 
lophage hirticula Knoch at 20 inches. The survey et this place was 
made on January 16. 
The second locality, where a similar survey was conducted on 
January 29, was the asbury Park Golf Course at Hamilton, Monmouth 
County, N. J. The soil here was a light sand or sandy loam, pale 
gray near the surface, becoming darker and heavier with increase in 
depth. Smell rounded pebbles were scattered through the soil, but 
were not numerous... Four trenches were also dug here, two to 40 ~ 
inches, one to 35, and one to 30 inches. The first two were dug on 
high ground where drainage was good and the water table deep, the 
other two in relatively low ground where the water table was close 
to the surface. One of the trenches on the higher ground was dug 
at a spot where cuttings from the greens had been dumped earlier in 
the year, but from which they had been removed long before the dig- 
ging was made. This trench yielded large numbers (290) of larvae 
of Cotinis nitida L., but no cther form of Scarabaeidae. The 
greatest depth reached by these was 33 inches. The sercentages 
found at various depths were roughly as follows: 1-5 inches, 4.5 
percent; o-10 inches, 18.5 percent; 10-15 inches, 31.5 percent;. ~ 
15-26 inches, 30. percent; 20-25 inches, 11.5 percent; 25-30. inches, 
5 percent;. below 30- inches, 1 percent. In the second trench, which 
was dug nearby, but in ground which had not been covered at any 
time by extraneous material, larvae were much gcarcer, only 19 be- 
ae abana ati apostate: Pepresen ted | Types except three 
wich were Cotinis. The greatest depth at which Polyphylla was en- 
countered in this digging was 50 inches. None were found above 10 
inches but they were rather uniformly distributed from that deoth 
down to 30 inches. 
ioe 
