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 Aphis. ( Aphis mail 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 Skeletonizes. (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 larvae were destroyed, but full- 
grown larvae were observed on leaves, October 1st. 
Experiment 2.— HAMMOND’S SLUG SHOT. 
Dusted leaves seriously affected by larvae, September 15, when no dew 
was on them. 
Result. — September 16, 50 per cent, are dead. Dusted again, on 
17 th, 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 larvae 
feeding on walnut. 
Result. — The larvae were uninjured. 
Experiment 2.— POTASSIUM SULPHIDE. 
Solution as in 1. Applied to larvae clustered on trunk of tree, prepara- 
tory to molting. 
Result. — The larvae molted, and ascended the tree. I could not see 
that the application had the slightest effect. 
