-165- 
Corn oil, linseed oil, and cottonseed oil were tested as solvents 
for paradichlorobenzene against the lesser peach borer. Crude cotton- 
seed oil was the most suitable solvent used.—Snapp and Thomson (371 ) » 
Oil emulsions were tested in South Africa against various insects 
and mites on fruit trees. Maize oil was slightly inferior to raw lin- 
seed oil or seal oil.—Mally ( 263 ) . 
Hordenine methiodide was of no insecticidal value against the bean 
aphid. It was not materially toxic at or below a concentration of 1 gnu 
per 100 cc.~Tattersfield and coworkers ( 393 ) . £ Since hordenine is an 
alkaloid found in malt culms and mescal, this material may have been 
derived from fermented corn .J 
Comments by reviewer . — The family Poaceae so far has not furnished 
good material for insecticides, but it has furnished oil from citronella 
grass, which is one of our standard repellents. We should have further 
results on molasses grass to determine whether or not its sticky oil is 
really toxic, or kills mechanically, or is merely repellent. 
POLEMONIACEAE 
(Phlox Family) 
PHLOX PANICULATA L. Garden phlox. 
PHLOX SUBULATA L. Moss phlox. 
Bxtraots of these plants were not repellent to the Japanese beetle.- 
Metzger and Grant (277) . 
POLYGALACEAE 
(Milkweed Family) 
POLYGALA SENEGA L. Seneoa snakeroot. 
Extracts were not repellent to the Japanese beetle.— Metzger and 
Grant (277). 
Extracts of the roots (N. F.) killed only 10 percent of the mos- 
quito larvae tested. —Hartzell and Wilcoxon ( 188 ). 
POLYGONACEAB 
(Buckwheat Family) 
ANTIGONON LEPTOPTJS Hook. & Arn. 
Parts of this plant from Port-of-Spain, Trinidad, were tested in 
1929. The powder, used as a dust, and the petroleum ether extract, used 
as a spray, killed only a small percentage of the ourrant worms and the 
•four species of aphids tested. —Si evers and Mclndoo (unpublished notes). 
