31 
owner having removed to the other side of the city, and not having time 
to attend to them. On Saturday, June 20, there were no bugs there. 
I did not see them again till June 28, then I saw only 5 bugs on the lot. 
I have given them another sprinkling of tar lime since then, and there 
is not a bug to be found. I am sure they never got a particle of Paris 
green.* As many persons have an objection to putting Paris green on 
potatoes, I can recommend a dead shot made of one pint of gas tar to 
1 peck of lime as an effectual remedy against potato bugs. 
July 15, 1885. — As you directed, I have continued through this month 
to make experiments with the six vegetable substances you advised, 
namely, Ailantlius, Tansy, stramonium, Elder, mandrake, and tomato. 
Before I proceed further, I wish to say that during the fore part of 
this month I succeeded in cleaning a few hop vines in my yard and 
those of some of my neighbors from two species of a destructive cater- 
pillar, and also a species of Coreus or Stink Bug, which was doing much 
harm by sucking and killing the leaves of the vines. I herewith send 
specimens of the bug and the caterpillar.f I made a powder of gas tar 
and lime, which soon cleared the vines of ever 3 T insect, and now there are 
none to be found on them. I find this powder is good also for every 
species of Plant-louse. 
July 6. — Collected these leaves and plants, and made strong infu- 
sions. First tried them on the Cabbage Cut-worms, by burying a worm 
one lialf inch deep and within 1 or 2 inches of each cabbage plant, wet- 
ting them thoroughly with each liquid, and labeling each one. At the 
same time I tried Hansen & Smith’s Piuoleum, diluted with 25 parts of 
water. Next morning, when I went to examine my plants, I found the 
worms had all moved away but one ; this one had been wetted with 
tansy, was curled up in the usual way, and apparently in good health. 
It was evident, however, they did not like their situation, for only one 
ventured to cut his plant, and that was the one wetted with elder; he 
was also gone. 
I next tried the effect of these infusions on the Jumping Flea-beetle 
( Halticci ), on Early Dutch cabbages. Most of them proved very good, but 
w ere most effectual w hen followed by a dusting of lime powder or plaster. 
The liquid adheres better after the garden syringe than the w atering 
pot. Infusions of ailantlius leaves and also of stramonium I have used 
in former years for this and green fly and cabbage lice with good effect, but 
they were mostly followed by a dusting of lime in fine pow der. I w ould 
remark just here that tobacco dust, lime powder, plaster, ashes, or soot 
well mixed with five or six times its bulk of charcoal dust, or in fact any 
other dust, will effectually keep off the Jumping-bug, if the ground around 
the plants be kept stirred; and here is where many fail in applying these 
powders ; they do no( seem to be aware that it is necessary to stir the 
*1 should note that the saleratus was too strong, and killed part of the leaves of 
the potatoes as well as the bugs. 
t These insects were Agrotis malefida, Arctia virginioa , and Coreus tristis. — C. V. E. 
