20 
Result.—September 13, found hardly a trace of aphids. September 
16, a very few have appeared. September 25, they have spread over the 
grass, and are as abundant as ever. . 
EXPERIMENT 6.—SOLUBLE PINOLEUM. 
Solution of 5 parts pinoleum to 100 parts water, sprayed on same 
species, September 3. 
Result.—September 4, none appear affected and none are destroyed. 
X.—APPLE ApuHis. (Aphis mali Fabr.) 
EXPERIMENT 1.—SOLUBLE PINOLEUM. 
Solution of 15 parts pinoleum to 85 parts water. Sprayed on twigs 
and leaves. 
Result.—The aphids were completely destroyed. 
XI.—APPLE LEAF SKELETONIZER. (Pempelia hammondi Riley.) 
ExPERIMENT 1.—SOLUBLE PINOLEUM. 
Solution of 15 parts of pinoleum to 85 parts of water. Sprayed over 
leaves, September 15. 
Result.—Probably 75 per cent. of the larve were destroyed, but full- 
grown larve were observed on leaves, October 1st. 
EXPERIMENT 2.—HAMMOND’S SLUG SHOT. 
Dusted leaves seriously affected by larve, September 15, when no dew 
was on them. 
Result.—September 16, 50 per cent. are dead. Dusted again, on 
17th, on dew-wet leaves. October 1, not one living larva could be found 
on the leaves that had been dusted, while numbers were on leaves not 
treated. September 26, nine days after, a larva established itself on 
one of the dusted leaves, ate a very small spot on the leaf, and died. 
XII.—YELLOW-NECKED CATERPILLAR. (Datana ministra Dru.) 
EXPERIMENT 1.—POTASSIUM SULPHIDE. 
Solution of 1 part potassium to 500 parts water. Sprayed on larvee 
feeding on walnut. 
Result.—The larve were uninjured. 
EXPERIMENT 2.—POTASSIUM SULPHIDE. 
Solution asinl. Applied to larve clustered on trunk of tree, prepara- - 
tory to molting. 
Result.—The larve molted, and ascended the tree. I could not see 
that the application had the slightest effect. 
