er fend 
into the soil of potted plants and into "balled" nursery plants for the 
| purpose of destroying the larvae of the Japanese beetle. He reports 
that "the carbon disulphide emulsions prepared with castor—oil soap emul-— 
“sifier and with scdium resinate-oleate emulsifier are comparable in tox- 
' icity. it has been found possible to destroy infestation in 5~inch pots 
_ by injecting 1.25 cubic centimeters of emulsified carbon disulphide with 
200 cubic centimeters of water. The larvae have also teen destroyed in 
the soil of balled evergreens by injecting the emulsion and placing the 
sOil in dilute carbon disulphide emulsion for 1-1/4 hours." 
F. E. Baker, of the Moorestown laboratory, has found "that the for— 
_ Ging hydrangeas can be grown under cages of copper wire and galvanized- 
_ iron- wire throughout the growing season without causing injury to the 
plants. The results indicate that the plants can be kept free of infes- 
tation with the Japanese beetle by this procedure." 
In summarizing the trapping experiments for the season 1931, F. W. 
' Metzger, Moorestown, fourd "that traps with green cylinders and white baf— 
fles and funnels caught 115 per cent more (Japanese) beetles than traps 
which had not been painted for one or more seasons. The nickel traps 
caught 181 per cent more beetles than the standard trap. Traps with the 
‘bait in the baffle caught 117 per cent more beetles. The bait made in 
19350 was found to be as attractive as bait meade in 1931." 
Reporting on parasite investigations at the Moorestown laboratory 
_dJ.t4L. King says: "Among the most important observations of the season 
are those made by M. H. Brunson in his rearing work with field-collected 
' females of Tiphia popilliavora Rohwer. He finds that female Tiphia 
_ taken in the field at the same time females are being collected for col- 
_ Onization prcduced from 1,314 cocoons 632 male Tiphia and only 31 fe- 
males. While this is a preliminary rearing the results are sufficiently 
important to change future colonization methcds to the extent that at 
_ least an equal number or more males will be liberated with each unit of 
» females so as to insure fertilization. Further research to augment suc— 
_ cessful colonization of T. popilliavora will follow these preliminary 
-vrearings." 
R. W. Burrell submits a report of his research for parasites of 
scarabaeid beetles at Homebush, Australia, during September, in which 
he states: "A fair amount of scouting for Thynnidae was done locally 
about Sydney, and limited numbers of one species were secured flying 
_ about a strawberry bed. These were taken into the laboratory and tried 
- against all the species of grubs that occurred in the district near 
where they were taken. The Thynnidae lived only a week in captivity. 
' They readily paralyzed three of the five local species of grubs, but 
_.they did not deposit eggs thereon. Dissections show that their egg is 
rather heavily chitinized, and of the same approximate size and shape as 
i the eggs of Tiphia. Thynnidae emerged during the early part of the 
month from cocoons that were dug last fall in scd on the edge of a straw-— 
_ berry bed near Melbourne, so a field trip was mede to this place and 
Warrhambool, another place where cocoons were secured, the last of the 
month. However, a cold rainy spring has greatly delayed insect devel- 
a Ofment at both these places, and no Thynnidae were secured in the Piel 

